This section covers how to prefill form fields on your payment page using query string parameters.
You can easily prefill form fields on the payment form with the query strings and parameters below.
For the first parameter of your query string, ensure you enter a question mark "?". Then, use the ampersand symbol "&" for all following strings. See examples below.
You can read all about how query strings and their parameters work in the details below, but in the meantime, here are some examples you can copy/paste.
Let's say you want to accept a credit card payment from Stripe for $99/month and you already had that plan set up on your payment form. Here's the query string combination you would send to your customer or link on your site:
Let's say you want to accept a custom invoice amount for €59.99, you've created a custom field labeled "Invoice ID" on your form, and you want to select SEPA as the payment method to be used automatically. You would give this link to your customer: