In principle, the demolition contract must be signed by the owner of the house or the owner of the property. Other people need to sign it under certain conditions, that is, there is a power of attorney, which clearly States the reason for the entrustment, who the agent is, ID number, etc. It must be signed by the owner of the house or the owner of the property and the entrusted agent in quadruplicate, and two of them should be handed over to the village and the demolition office for their approval, even after telephone confirmation.
Without these procedures, the signature is completely invalid, and the householder or property owner can not recognize this contract when he comes back, and the law will not recognize it.
so, we should handle big things carefully, and don't give up all our efforts!