jan04849

[zealous breach]

Hi, let me help you with this.

Are you checking if the email is unique?

[fresh walrus]

They create accounts with different emails

So far I’ve had to check manually if a card was used multiple times on free trials. The email addresses are always different

[zealous breach]

I don't think you can do much, unfortunately. But I would also check with Stripe Support: https://support.stripe.com/?contact=true

[fresh walrus]

This customer was using a card that was already used for a different trial. Is there no technical way to get the unique fingerprint?

[zealous breach]

The fingerprint is there for exactly that: https://stripe.com/docs/api/payment_methods/object#payment_method_object-card-fingerprint

If it doesn't match then it's actually a different number.

[fresh walrus]

I thought so, but the documentation says this:

[zealous breach]

"Account" meaning Stripe Account. Not Customer object within a Stripe Account.

https://stripe.com/docs/api/payment_methods/object#payment_method_object-card-fingerprint:~:text=You can use this attribute to check whether two customers who’ve signed up with you are using the same card number%2C for example.

[fresh walrus]

Ah okay, thank you very much, I’ll try the fingerprint then!

[zealous breach]

Happy to help.

[fresh walrus]

Because my radar rule never triggered, but maybe I’ll just query it and save the fingerprints in my db