Legal analysis: the entrustment contract or power of attorney concluded in written form can be handwritten or printed. As long as the power of attorney is the true intention of the client, and its entrusted content does not violate the mandatory provisions of laws and regulations, it has legal effect. Therefore, when signing a house sales contract, even if the trustee produces a handwritten power of attorney, as long as the power of attorney is the true meaning of the client, it has legal effect.
Legal basis: Civil Code of People's Republic of China (PRC).
Article 135 A civil juristic act may be in written form, oral form or other forms; Where laws and administrative regulations stipulate or the parties agree to adopt a specific form, it shall adopt a specific form.
Article 919 An entrustment contract is a contract in which the principal and the agent agree that the agent shall handle the principal's affairs.