✔ 最佳答案
It is a usual practice that you simply write to your bank about your changes of address, contact phone no. by letter signed by you. The bank ccould then verifiy your signature with their record. Moreover, this is quite common. However, if you want to authorise a person to operate the bank account on behalf of you, it is the usual practice that your friend should go to the bank and signed any documents in front of the bank staff as a matter of witness. " I hereby authorise Mr. A to act on my behalf for the operation of my accounts in your bank."