Legal analysis: the house lease contract can be signed on behalf of others. In order to avoid disputes, it is necessary to submit a written power of attorney issued by the client and the identity certificates of the client and the trustee. If someone else is not explicitly authorized to sign, the contract is invalid. The power of attorney needs to indicate the entrusted matters and authorization authority. Both the principal and the trustee should be persons with full capacity.

Legal basis: Article 920th of the Civil Code of People's Republic of China (PRC), the trustor may entrust the trustee to handle one or several specific affairs, or entrust the trustee to handle all general affairs.