NextAuth.js

Auth framework guides

Learn how to record deferred lead conversions with LinkKit.

Deferred lead tracking

Discover how to track sales without first recording a lead event in LinkKit.

Direct sale tracking

<p>Learn how to record and manage refund events for your LinkKit partner program.</p>
          <section class="kb-color-block kb-color-block--success" data-variant="success" style="background-color:#f0fdf4;border-color:#86efac;">
            <div class="kb-color-block__title" style="color:#166534;border-color:#86efac;display:flex;align-items:center;gap:0.5rem;">
              <span class="kb-color-block__icon" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-lightbulb" aria-hidden="true"><path d="M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5"></path><path d="M9 18h6"></path><path d="M10 22h4"></path></svg></span>
              <span class="kb-color-block__title-text">Business Plan Requirement</span>
            </div>
            <div class="kb-color-block__body" style="color:#2f6f49;">This feature is only available on LinkKit Business plans and above.</div>
          </section>
        <p>If you’re using <strong>LinkKit Partners</strong> for your affiliate program, you may also want to track refund events and update the status of the related partner commissions accordingly.</p>
          <section class="kb-color-block kb-color-block--info" data-variant="info" style="background-color:#eff6ff;border-color:#93c5fd;">
            <div class="kb-color-block__title" style="color:#1d4ed8;border-color:#93c5fd;display:flex;align-items:center;gap:0.5rem;">
              <span class="kb-color-block__icon" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-circle-alert" aria-hidden="true"><circle cx="12" cy="12" r="10"></circle><line x1="12" x2="12" y1="8" y2="12"></line><line x1="12" x2="12.01" y1="16" y2="16"></line></svg></span>
              <span class="kb-color-block__title-text">Commission Refunds and Clawbacks</span>
            </div>
            <div class="kb-color-block__body" style="color:#3b82f6;">Commissions that have already been paid cannot be refunded. To handle this, set a payout holding period that matches your company’s refund policy. For example, if your refund policy is 30 days, set the payout holding period to 30 days. If you need to reverse a commission that has already been paid, you can create a clawback instead.</div>
          </section>
        <h2>Tracking Refunds with the Stripe Integration</h2><p>Good news — if you’re using the <strong>LinkKit Stripe integration</strong>, refund events are tracked automatically without requiring any additional configuration.</p>
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    <h2>Tracking Refunds Manually</h2><p>If you’re not using the <strong>LinkKit Stripe integration</strong> and are tracking sales manually, you can track refunds by following these steps:</p><h3>1. Include invoiceId When Tracking a Sale</h3><p>When sending a sale event using POST /track/sale, make sure to include a unique invoiceId value that identifies the specific transaction.</p><h3>2. Find the Related Commission</h3><p>When a refund occurs, locate the corresponding commission by searching your commissions using the same invoiceId that was provided when tracking the sale.</p><h3>3. Update the Commission Status</h3><p>Finally, use the PATCH /commissions/{id} endpoint to update the commission status to <strong>refunded</strong>.</p><p>Once updated, the refunded commission will be excluded from any pending partner payouts.</p>

Learn how to record and manage refund events for your LinkKit partner program.

Tracking refunds

Conversion tracking

<h1>Welcome to Linkkit</h1><p>Linkkit is an all-in-one link management and analytics platform that helps businesses create branded short links, track performance, manage marketing campaigns, and measure conversions—all from a single dashboard.</p><p>Whether you&#39;re:</p><ul><li>A business owner looking to build stronger marketing campaigns with branded links</li><li>A marketer who needs detailed analytics to measure traffic, conversions, and campaign performance</li><li>A developer integrating powerful link management and analytics into an application</li><li>An agency managing links and campaigns for multiple clients</li></ul><p>Linkkit provides everything you need to create, share, and optimize your links with confidence.</p><h2>Key Features</h2><p>Linkkit includes a comprehensive set of tools designed to simplify link management and improve marketing performance.</p><p>Some of the features include:</p><ul><li>Branded short links with custom domains</li><li>QR code generation with analytics</li><li>Real-time click and visitor analytics</li><li>UTM campaign builder and tracking</li><li>Custom link aliases</li><li>Bulk link creation and management</li><li>Smart redirects and routing rules</li><li>Link expiration and password protection</li><li>Event webhooks</li><li>REST API for custom integrations</li><li>Team collaboration and workspace management</li><li>Conversion tracking and performance insights</li></ul><h2>What would you like to do?</h2><p>Explore the documentation to learn how to create your first short link, connect a custom domain, generate QR codes, track analytics, integrate with the API, and get the most out of Linkkit.</p>

Getting Started

Introduction

Discover how to track lead conversion events using Clerk and LinkKit.

Clerk

Discover how to track lead conversion events using Better Auth and LinkKit.

Better Auth

Learn how to track lead conversion events with Auth0 and LinkKit


Auth0

Learn how to track user sign-ups with Supabase and LinkKit


Supabase

<h3>Understanding Linkkit Attribution &amp; Conversion Tracking</h3><p>Learn how Linkkit tracks your visitors from the moment they click a link until they complete a conversion. Linkkit&#39;s attribution system helps you understand which campaigns, channels, QR codes, and referral sources drive the most valuable traffic.</p><h3>Attribution Workflow</h3><p>Linkkit follows a multi-stage attribution process that connects every step of the customer journey.</p><ul><li>Stage 1: Click Tracking</li><li>Stage 2: Lead Tracking</li><li>Stage 3: Conversion Tracking</li></ul><p>This workflow provides a complete picture of how users interact with your marketing campaigns.</p><h3>Stage 1: Click Tracking</h3><p>Whenever someone clicks a Linkkit short link, QR code, or branded URL, the click is securely recorded before the visitor is redirected to the destination page.</p><p>Each click generates a unique tracking identifier that enables Linkkit to associate future events with the original visit.</p><h3>Information Captured</h3><p>Every click can include data such as:</p><ul><li>Unique click ID</li><li>Timestamp</li><li>Country, city, and region</li><li>Device type</li><li>Browser and operating system</li><li>Referrer URL</li><li>UTM campaign parameters</li><li>Link or QR Code source</li><li>Custom metadata (if configured)</li></ul><p>The visitor is redirected with a unique tracking parameter, for example:</p><p>Example URL</p><p>Code</p><p>Text</p><p>https://yourwebsite.com?lk_id=abc123xyz</p><p>The Linkkit Analytics SDK automatically detects this parameter and stores it as a secure first-party cookie.</p><p>Cookie Example</p><p>lk_id=abc123xyz</p><h3>Why First-Party Cookies?</h3><p>Using first-party cookies allows Linkkit to:</p><ul><li>Maintain attribution across pages and sessions</li><li>Improve reliability across modern browsers</li><li>Reduce the impact of ad blockers</li><li>Support privacy-friendly tracking</li><li>Provide consistent conversion reporting</li></ul><p>By default, attribution remains active for 90 days, although this duration can be customized.</p><h3>Stage 2: Lead Tracking</h3><p>When a visitor performs an important action—such as creating an account, submitting a form, requesting a demo, or booking a meeting—you can record a Lead event.</p><p>This connects the visitor with the original tracked click.</p><p>Example:</p><p>Lead Tracking</p><p>JavaScript</p><p>To prevent duplicate records, Linkkit automatically deduplicates lead events using the combination of:</p><ul><li>Customer ID</li><li>Event Name</li></ul><p>Only the first matching event is stored.</p><h3>Stage 3: Conversion Tracking</h3><p>Once the customer completes a purchase or another valuable action, record a conversion event.</p><p>Example:</p><p>Conversion Tracking</p><p>JavaScript</p><p>Linkkit automatically associates the conversion with the customer&#39;s original click and lead event, allowing you to measure campaign performance and conversion value accurately.</p><h3>Attribution Models</h3><p>Linkkit supports multiple attribution strategies depending on your marketing goals.</p><h3>Last-Click Attribution (Default)</h3><p>The most recent tracked click before the conversion receives full credit.</p><p>This is the most commonly used model for digital marketing because it rewards the campaign that directly influenced the conversion.</p><h3>First-Click Attribution</h3><p>The first tracked click receives credit, even if the visitor later returns through different marketing channels.</p><p>This model is useful for measuring awareness campaigns and top-of-funnel marketing efforts.</p><h3>Attribution Behavior</h3><table><tbody><tr><td><p>Attribution Model</p></td><td><p>Behavior</p></td></tr><tr><td><p>Last Click</p></td><td><p>Latest click receives credit</p></td></tr><tr><td><p>First Click</p></td><td><p>Original click receives credit</p></td></tr></tbody></table><p>All clicks continue to appear in analytics, even if only one receives attribution.</p><h3>Attribution Window</h3><p>The attribution window defines how long Linkkit remembers a visitor after they click a tracked link.</p><p>Default configuration:</p><table><tbody><tr><td><p>Setting</p></td><td><p>Default</p></td></tr><tr><td><p>Attribution Window</p></td><td><p>90 Days</p></td></tr></tbody></table><p>You can customize this period to match your business requirements.</p><p>If the attribution window expires before a conversion occurs, the conversion will not be linked to the original click.</p><h3>Cross-Domain Tracking</h3><p>Many customer journeys span multiple websites or subdomains.</p><p>Linkkit supports attribution across domains such as:</p><ul><li>website.com → app.website.com</li><li>app.website.com → checkout.website.com</li><li>website.com → landingpage.com</li></ul><p>Cross-domain tracking helps preserve attribution throughout the entire customer journey.</p><h3>Conversion Workflow</h3><p>When a conversion is recorded, Linkkit performs the following steps automatically:</p><ul><li>Receives the conversion event.</li><li>Matches the customer with a previous lead.</li><li>Identifies the original tracked click.</li><li>Connects the conversion with the corresponding campaign, link, QR code, or traffic source.</li><li>Updates analytics and reporting dashboards.</li></ul><p>This process gives you complete visibility into marketing performance.</p><h3>Direct Conversion Tracking</h3><p>If your application does not have a signup or lead stage, you can associate a conversion directly with a tracked click.</p><p>Example:</p><p>Direct Conversion Tracking</p><p>JavaScript</p><p>This is useful for one-time purchases and simplified checkout flows.</p><h3>Deferred Lead Tracking</h3><p>Some businesses only qualify leads after a trial period or approval process.</p><p>Linkkit supports deferred lead attribution, allowing you to:</p><ul><li>Record the initial signup</li><li>Delay qualification until the customer reaches a defined milestone</li><li>Preserve the original attribution throughout the process</li></ul><p>This ensures marketing reports accurately reflect qualified conversions rather than every signup.</p><h3>Troubleshooting Attribution</h3><h3>Common Issues</h3><table><tbody><tr><td><p>Issue</p></td><td><p>Possible Cause</p></td><td><p>Recommended Solution</p></td></tr><tr><td><p>Conversion not attributed</p></td><td><p>Tracking cookie missing</p></td><td><p>Verify SDK installation and cookie configuration</p></td></tr><tr><td><p>Incorrect campaign credited</p></td><td><p>Attribution model settings</p></td><td><p>Review whether First Click or Last Click better fits your use case</p></td></tr><tr><td><p>Duplicate leads</p></td><td><p>Repeated customer events</p></td><td><p>Use a consistent Customer ID across events</p></td></tr><tr><td><p>Missing conversions</p></td><td><p>Events sent in the wrong order</p></td><td><p>Ensure clicks are recorded before lead or conversion events</p></td></tr></tbody></table><h3>Verifying Attribution</h3><p>To confirm everything is working correctly:</p><ul><li>Inspect browser cookies to verify the lk_id cookie exists.</li><li>Click a tracked Linkkit link and complete a test conversion.</li><li>Check the Analytics dashboard to confirm the click, lead, and conversion appear.</li><li>Review campaign reports to ensure attribution has been recorded correctly.</li></ul><p>With Linkkit&#39;s attribution system, you can confidently measure the effectiveness of every marketing campaign, understand the complete customer journey, and make data-driven decisions to improve conversion performance.</p>

How attribution works

lA demonstration of how conversion tracking works with Linkkit, including the setup and tracking of conversion events.

Server-side tracking

Learn how to track sales conversion events with Linkkit on the client side, allowing you to attribute purchases and revenue directly from your frontend application.

Client-side tracking

Web installation

How to Add the Linkkit iOS SDK to Your Swift Project

Swift

React Native

Mobile installation

Learn How to Track Sale Conversion Events with Stripe and Linkkit

Stripe

Learn how to track sale conversion events using Google Tag Manager (GTM) and Linkkit to measure purchases, subscriptions, and revenue generated from your referral links.

Google Tag Manager

<p>Learn how to track sale conversion events using <strong>Shopify</strong> and <strong>Linkkit</strong> to measure purchases, revenue, and customer conversions from your referral links.</p>
          <section class="kb-color-block kb-color-block--success" data-variant="success" style="background-color:#f0fdf4;border-color:#86efac;">
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              <span class="kb-color-block__icon" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-lightbulb" aria-hidden="true"><path d="M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5"></path><path d="M9 18h6"></path><path d="M10 22h4"></path></svg></span>
              <span class="kb-color-block__title-text">Business Plan Availability</span>
            </div>
            <div class="kb-color-block__body" style="color:#2f6f49;">This feature is available only on Business plans and higher-tier subscriptions.</div>
          </section>
        <p>Linkkit’s Shopify integration automatically listens for orders from Shopify and records them as sale conversion events in Linkkit.</p>
      <figure class="kb-article-image kb-article-image--full">
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    <p>In this guide, we’ll cover how to track sale events from Shopify using Linkkit’s Shopify integration.</p>
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    <h3>Step 1: Enable Conversion Tracking for Your Links</h3><p>Before you can start tracking conversions, you need to enable conversion tracking for your <strong>Linkkit links</strong>.</p>
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              <span class="kb-color-block__icon" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-lightbulb" aria-hidden="true"><path d="M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5"></path><path d="M9 18h6"></path><path d="M10 22h4"></path></svg></span>
              <span class="kb-color-block__title-text">Linkkit Partners</span>
            </div>
            <div class="kb-color-block__body" style="color:#2f6f49;">If you&#39;re using Linkkit Partners, you can skip this step since partner links have conversion tracking enabled by default.</div>
          </section>
        
          <details class="kb-accordion" data-accordion-block="true">
            <summary class="kb-accordion__summary">Option 1: Workspace-Level Setup</summary>
            <div class="kb-accordion__body">To enable conversion tracking for all new links created within a workspace:<br /><br />Go to your workspace’s Tracking Settings page.<br />Turn on the Workspace-Level Conversion Tracking toggle to enable conversion tracking for the entire workspace.</div>
          </details>
        
          <details class="kb-accordion" data-accordion-block="true">
            <summary class="kb-accordion__summary">Option 2: Link-Level Setup</summary>
            <div class="kb-accordion__body">If you don’t want to enable conversion tracking for every link in your workspace, you can enable it only for specific links.<br /><br />To enable conversion tracking for an individual link, open the Linkkit Link Builder, select the desired link, and turn on the Conversion Tracking toggle.</div>
          </details>
        
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            <summary class="kb-accordion__summary">Option 3: Via the API</summary>
            <div class="kb-accordion__body">You can also enable conversion tracking programmatically using the Linkkit API.<br /><br />Simply pass trackConversion: true when creating or updating a link to activate conversion tracking.</div>
          </details>
        <p><br /></p><h3>Step 2: Install the Linkkit Shopify App</h3><h4>1. Install the Shopify App</h4><p>Install the <strong>Linkkit Shopify App</strong> from the Shopify App Store to connect your Shopify store and enable conversion tracking.</p>
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    <p><br /></p><h3>2. Connect Shopify to Your Linkkit Workspace</h3><p>After installing the app, you’ll be prompted to connect your <strong>Linkkit workspace</strong> with Shopify.</p><p>Select <strong>Connect</strong> to link your Shopify store with your Linkkit workspace.</p><p>Once connected, you’ll be redirected back to Shopify, where you’ll see a list of links available in your Linkkit workspace.</p>
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    <p>With the <strong>Linkkit Shopify app</strong>, you can also create links with conversion tracking enabled directly from your Shopify store.</p>
      <figure class="kb-article-image kb-article-image--full">
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    <p>If you need more advanced link creation options, you can use the <strong>Linkkit Link Builder</strong> to create conversion-enabled links with additional customization.</p><h3>3. Activate Linkkit Analytics Script</h3><p>After installing the <strong>Linkkit Shopify app</strong>, the Linkkit Analytics script is added as an app embed. However, you need to manually enable it to ensure it loads with your current Shopify theme.</p><p>To activate the Linkkit Analytics script:</p><ul><li>Open your <strong>Shopify Admin Panel</strong>.</li><li>Go to <strong>Online Store → Themes</strong>.</li><li>Click <strong>Customize</strong> for your active theme.</li><li>In the theme editor, open the <strong>App Embeds</strong> tab.</li><li>Find the <strong>Analytics Script for the Linkkit Shopify app</strong> and toggle it on to activate.</li></ul>
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              <span class="kb-color-block__icon" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-lightbulb" aria-hidden="true"><path d="M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5"></path><path d="M9 18h6"></path><path d="M10 22h4"></path></svg></span>
              <span class="kb-color-block__title-text">Linkkit’s Shopify integration automatically sends the following events to Linkkit:</span>
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            <div class="kb-color-block__body" style="color:#2f6f49;">orders/paid: Triggered when a customer successfully completes a purchase on your Shopify store. This event is used to track sales generated through Linkkit links.<br />app/uninstalled: Triggered when the Linkkit app is removed from a Shopify store. This event removes the integration from your Linkkit workspace.<br /><br />In addition to these events, Linkkit also subscribes to Shopify’s required compliance webhook topics to ensure the integration follows Shopify’s platform requirements.</div>
          </section>
        <h3>Step 3: View Conversion Results</h3><p>Your setup is complete! You can now monitor your conversion performance and track revenue generated through your Linkkit links.</p><p>Linkkit provides three different views to help you analyze your conversion data:</p><h3>Time-Series View</h3><p>A timeline-based view that shows the number of <strong>clicks, leads, and sales</strong> over a selected period.</p><p>This helps you track trends and understand how your conversion performance changes over time.</p>
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    <h3>Funnel Chart View</h3><p>A visual overview of your conversion funnel that displays <strong>conversion rates and drop-off points</strong> at each stage of the customer journey:</p><p><strong>Clicks → Leads → Sales</strong></p><p>This view helps you identify where users are dropping off and measure how effectively your links convert visitors into customers.</p>
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    <h3>Real-Time Events Stream</h3><p>A live stream that displays every conversion event generated across all your <strong>Linkkit links</strong> within your workspace.</p><p>This view allows you to monitor conversion activity in real time and track events such as clicks, leads, and sales as they happen.</p>
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    <h3>Currency Conversion Support</h3><p>For simplicity, <strong>Linkkit records all Shopify sales in the store’s default currency</strong>.</p><p>For example, if your Shopify store uses <strong>USD</strong> as its primary currency, Linkkit will record all sales in <strong>USD</strong>, even when customers complete purchases using a different currency.</p>
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                  data-copy-code="// Shopify orders/paid event payload
// @see: https://shopify.dev/docs/api/webhooks?reference=toml#list-of-topics-orders/paid
{
  ...
  &quot;current_subtotal_price_set&quot;: {
    &quot;shop_money&quot;: {
      &quot;amount&quot;: &quot;398.00&quot;, // this is the amount that LinkKit will record
      &quot;currency_code&quot;: &quot;USD&quot; // this is the currency of your Shopify store
    },
    &quot;presentment_money&quot;: {
      &quot;amount&quot;: &quot;572.25&quot;,
      &quot;currency_code&quot;: &quot;CAD&quot;
    }
  },
  ...
}"
                  onclick="navigator.clipboard?.writeText(this.dataset.copyCode || '').catch(() => {})"
                >
                  Copy
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              <div class="kb-code-sample__panels">
                
                      <div class="kb-code-sample__panel" data-index="0">
                        <pre class="kb-code-sample__code"><code><span class="kb-code-sample__comment">// Shopify orders/paid event payload</span>
<span class="kb-code-sample__comment">// @see: https://shopify.dev/docs/api/webhooks?reference=toml#list-of-topics-orders/paid</span>
{
  ...
  <span class="kb-code-sample__string">&quot;current_subtotal_price_set&quot;</span>: {
    <span class="kb-code-sample__string">&quot;shop_money&quot;</span>: {
      <span class="kb-code-sample__string">&quot;amount&quot;</span>: <span class="kb-code-sample__string">&quot;398.00&quot;</span>, <span class="kb-code-sample__comment">// this is the amount that LinkKit will record</span>
      <span class="kb-code-sample__string">&quot;currency_code&quot;</span>: <span class="kb-code-sample__string">&quot;USD&quot;</span> <span class="kb-code-sample__comment">// this is the currency of your Shopify store</span>
    },
    <span class="kb-code-sample__string">&quot;presentment_money&quot;</span>: {
      <span class="kb-code-sample__string">&quot;amount&quot;</span>: <span class="kb-code-sample__string">&quot;572.25&quot;</span>,
      <span class="kb-code-sample__string">&quot;currency_code&quot;</span>: <span class="kb-code-sample__string">&quot;CAD&quot;</span>
    }
  },
  ...
}</code></pre>
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        <p><br /></p>

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