I just suggest that " use a different re-payment address " for every customer, else suppose two person have due loans and both say they paid and you got only once, how will you verify ? and suppose someone withdrawn from exchange cant even sign message with that address.
Well the only way to verify would be to request proof that they own the address. However, you are right. If someone was withdrawing from a service that could complicate things.Thank you for your input, I'll keep this in mind. For every loan there will be a unique payment address.
Update:
Thread will remain closed until I see the need for it.
