fraud with payments
blcksys
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Posted on
Nov-07-2022
05:22 PM
I wanted to integrate paypal express checkout into my service, but, what concerns me is: what prevents users from defrauding the system and modifying amounts?
I give an example:
user come to my service and click to purchase XYZ for 9,99$
user alter the POST request and set payment to be 0,09$ instead
get redirected to paypal website -> now the amount he has to pay is 0,09$ instead of 9,99$
he pays -> get redirected to my service as success payment
he got a product worth 9,99$ by paying 0,09$ defrauding the system
So, how exactly you prevent that?
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