Your contact details
Contact details of the tax office
At ... (place), on ... (date),
Registered letter with acknowledgement of receipt
Subject: Tenant's move
Owner of the dwelling located at ..., and in accordance with article 1686 of the General Tax Code, I inform you that Mr. ..., tenant of the aforementioned dwelling since ..., has given me notice to vacate on ...
Please accept, Madam, Sir, the assurance of my highest consideration.