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Hi, I cant donate second time after I donate. Why I cant donate in the same day second time? It says that I need put mobile number to sand some SMS message, but I have it and in the first time it doesn't asked me about this number. I repeat, I have it associated to my credit card.Or you can donate just 1 time per day? Some explanations, pls?!
Are you sure it's Paymentwall that is asking for it and not some security system of your bank? If so, it might be for additional security when people try to make multiple purchases with the same card. If you want an explanation, contact Paymentwall support.
It's quite possible that's Paymentwall. Multiple, sequential purchases of small value from the same store is a very common thing with stolen credit cards (or with someone mistakenly pushing a confirm button more than once and generating duplicates), so it triggers fraud checking. That's not a Paymentwall thing, though, it's a common practice in the market.