Handled in the property.

The modification of the contract is valid only after both parties sign it. If one party can't sign, it should authorize others to do it.

The property has no right to change its name for you, and you have not entrusted the property to handle it, so it is illegal.

The renaming of the real estate contract must be re-filed with the Housing Authority. It should be that both parties have to go before filing a case.

In fact, when you buy a house, you usually sign a entrustment document. If you accidentally sign an agency agreement with an intermediary company, agency company or property management company, it will be legal in form.

However, if the principal fails to inform the client of the information that should be informed in time and obtains the consent of the client, the agency is invalid.