1. The power of attorney is not a special document, which is no different from the effective conditions of an ordinary contract. All this will take effect after the customer signs it.

2. The legal person signature includes the official seal and the signature of the legal representative. One of them is enough, of course, it is best to have both. Note that it is the signature of the legal representative. It is not enough to have a private seal unless you can prove that the seal can represent him. It's too easy to carve a radish seal.