PayPal F&F IPN Forwarding

Overview

PayPal may block or filter direct IPN forwarding links that point to SellAuth.com. To ensure the safety of your PayPal account & reliable invoice processing, you can route IPN requests through your own Cloudflare Worker, using your own domain or a workers.dev subdomain.

This setup is only required for PayPal Friends & Family payments.

Step-by-Step Guide

1: Create a Cloudflare Worker

1. Log in at https://dash.cloudflare.com
2. Select your Cloudflare account
3. In the sidebar go to Build → Compute & AI → Workers & Pages
4. Click Create application
5. Under Workers, choose Create Worker
6. Select Start with Hello World and click Get started
7. Click Deploy
8. After deployment, click Edit code

2: Replace the code with the IPN forwarder

Delete everything and paste:

export default {
  async fetch(request) {
    if (request.method !== 'POST') {
      return new Response('Only POST allowed', { status: 405 });
    }

    const body = await request.text();
    const targetUrl = 'https://sellauth.com/invoice/paypalff/webhook';

    try {
      const upstreamResponse = await fetch(targetUrl, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded'
        },
        body
      });

      const responseBody = await upstreamResponse.text();
      return new Response(responseBody, {
        status: upstreamResponse.status,
        headers: upstreamResponse.headers
      });

    } catch (err) {
      return new Response('Forwarding error', { status: 500 });
    }
  }
};

This Worker forwards the raw IPN body to SellAuth and mirrors the response so PayPal retries automatically if something fails.

3: Deploy and copy your Worker URL

Click Deploy again. Cloudflare will give you a URL like:

https://your-worker.yourname.workers.dev

This is your IPN URL. Copy it.

3.a (Optional): Use your own domain instead of workers.dev

If you prefer to use your own domain:

1. In Cloudflare dashboard go to Workers & Pages → Settings → Domains & Routes
2. Click Add
3. Choose Custom domain
4. Enter the path you want, e.g.: https://yourdomain.com/paypal-ipn
5. Select the Worker you created

Now you can use https://yourdomain.com/paypal-ipn as your IPN URL.

4: Add your Worker URL to PayPal

1. Go to: https://www.paypal.com/merchantnotification/ipn/preference
2. Click Choose IPN Settings
3. Paste your Worker or custom domain URL
4. Enable IPN
5. Save

You're done!

Your PayPal Friends & Family IPNs will now route through your own Cloudflare Worker, avoiding PayPal filters while still reaching SellAuth reliably.