We have the promotion rule "Uses per Customer =1". Today, we noticed one customer (based on payment information) uses the discount code several times, since he is entering fake info. Is there any way to prevent such scenario.
As discussed in comments, he is entering different email id and getting benefit of coupon codes.
if he entered different email address, than its not his problem, magento will work like that only.
based on customer = based on email address
may be you can try with restricting discount on i.p address.