Can Coinbase refund money? Yes,Coinbase generally does not offer refunds for completed crypto transactions due to the irreversible nature of blockchain. 1-(866)-719-5714 (Helpline Number) However, in cases of unauthorized activity or mistaken deposits, Coinbase may investigate.1-(866)-719-5714 So, can Coinbase refund money in all cases? No, but if eligible, can Coinbase refund money Yes, under specific conditions.1-(866)-719-5714