Mai Si Tong is an English training institution. When refunding fees, it is necessary to verify the identity information to prevent fraudulent use or fraudulent use of identity information. At the same time, it is necessary to provide proof of payment and other related materials when refunding the fee, so as to check whether the refund amount is consistent with the identity information. When going through the refund procedures, users need to provide valid identification. The ID number is a clear sign of China citizenship and can be used as an important basis for identifying users.