How would I fill out the bottom of a payment agreement when it says signed this ____ day of ______, ____, at ______, ______? A witness signature refers to the signature of an individual who has observed the signing of a legal document and can attest to its authenticity.A facility management agreement is a verbal or written agreement between a client and service provider that intends to provide facility services. STEP 1: Fill out the Joint Report form. A. General Instructions. 1. If I do not fill out these forms who will make medical decisions for me? Management Services.