I don't have a contract with my T but we have an understanding, and I have used it, that I can call in a crisis. I do, however, have a written "contract" posted inside a cabinet in my kitchen for my family. It's a "what to do" if my behavior starts to change or escalate into mania/depression or SI/SU. This way I can't back out because I wrote it and told them what to do if XYZ happens.