1, signature is required. Generally, when spending abroad, you don't need to enter a password, just check your signature. According to the regulations of the international credit card organization, within six months after the consumption is credited to the merchant's account, the issuing bank can refund the bill according to the cardholder's request. At this time, the merchant must provide the signed shopping list and the proof that the cardholder has spent here, such as sales contract, invoice stub, accommodation registration, etc.

2. Does the credit card verify the electronic signature? Never heard of it. Electronic signature is just an application of network technology.

3. Generally, there will be three signature forms, one for the cardholder, one for the merchant, one for the bank, and only two for some banks, one for the cardholder and one for the merchant.