nevres_

[cosmic bridge]

Hi! Let me help you with this.

Stripe is designed to be flexible enough to support all kinds of business logic. In this context, making a single attribute like email (or phone etc.) unique, is quite arbitrary. There's a unique property of ID, but if you want to have customers with unique emails, you can always retrieve it with API prior to creating/updating: https://stripe.com/docs/api/customers/retrieve

[elfin parrot]

Yes makes sense, thanks for answering.
I am planing to make assosicate email with customer uniqueness. So email should be unique to each customer. Do you see any issues with that approach. Thanks in advance.

[cosmic bridge]

No, that's quite common. Just make sure to check if such customer exists by retrieving it by email.