Source: https://datafa.st/docs/polar-other-methods
Markdown source: https://datafa.st/docs/polar-other-methods.md
Description: Track Polar payments using customer email for any payment method. Works with custom checkouts, subscriptions, and third-party integrations.
# Attribute revenue with Polar (other methods)
← [Revenue attribution guide](/docs/revenue-attribution-guide)
# Attribute revenue with Polar (other methods)
> If you're using Polar Checkout API, follow [this guide](/docs/polar-checkout-api) instead. If you're using Polar Checkout Links, follow [this guide](/docs/polar-checkout-links) instead. Make sure you've [connected your Polar account](/docs/connect-payment-provider) first.
Use the JavaScript snippet below to track revenue after successful payment by passing the customer's email:
```javascript
// Track revenue after successful payment using email
window.datafast("payment", { email: "customer@example.com" });
```
> Pass the actual email of the customer to the payment event.
## Example implementation
Let's say your customers are redirected to a `/welcome` page after completing a checkout. You want to fire the DataFast payment event on this page. Using React, you can do this like this:
```jsx
"use client"
import { useEffect } from 'react';
export default function Dashboard({ user }) {
useEffect(() => {
window.datafast("payment", { email: user.email });
}, [user]);
return (
Welcome to the app!
);
}
```
### Ensure reliable tracking (recommended)
Add this script to the `` of the page that tracks the payment to guarantee that the payment event is captured even when triggered before the main script loads:
```html
```
## When to use this method
- Third-party payment processors that use Polar
- Mobile app payments
## Important notes
- Duplicate payment events are ignored so you don't need to worry about sending multiple events for the same payment
- Works with any payment flow as long as you have the customer's email
> After receiving a successful payment, you should see revenue data in your dashboard (referrer, country, browser, etc.).