mathiasm8

[shrewd parrot]

hello! that's expected behavior, Stripe doesn't de-duplicate customers with the same email for you at the moment.

If you want to prevent duplication of customers, you would want to implement Checkout Sessions instead where you can explicitly pass in a Customer ID : https://stripe.com/docs/api/checkout/sessions/create#create_checkout_session-customer

If you're using Payment Links instead, you can limit customers to a single subscription : https://stripe.com/docs/payment-links/customer-info#limit-subscriptions so that you don't end up with duplicate customers