If the house purchase deposit agreement is signed by myself, it is invalid, depending on whether the signatory has the power of agency. If there is no agency right, the contract is a contract with pending validity.

According to the provisions of Article 171 of the Civil Law, if the actor has no agency right, exceeds the agency right or continues to act as an agent after the agency right is terminated, it will have no effect on the principal without ratification by the principal.

The counterpart may urge the principal to ratify it within 30 days from the date of receiving the notice. If the trustor fails to declare it, it shall be deemed as refusal to ratify it. Before the act committed by the actor is ratified, the bona fide counterpart has the right to revoke it. Revocation shall be made by notice.

If the act committed by the actor is not ratified, the bona fide counterpart has the right to demand the actor to perform the debt or demand the actor to compensate for the damage he has suffered. However, the scope of compensation shall not exceed the benefits that the counterpart can obtain when the principal ratifies.

If the counterpart knows or should know that the actor has no right to act as an agent, the counterpart and the actor shall bear the responsibility according to their respective faults.