The purpose of the affidavit is to affirm the facts stated regarding their non-cohabitation for legal purposes. Use our Washington Forms Online program.Complete the forms as explained in the instructions below. Service of process of the forms is not required. The purpose of the execution of this affidavit is to affirm the facts alleged herein and for whatever legal purpose it may serve. It is a form both parents sign and file with the Washington Department of Health stating that the person the form names is the only possible father. Heated disagreements in Washington State divorces often boil down to whether an asset should be characterized as community property or separate property. " Being married is not a prerequisite to adoption. AFFIDAVIT OF NON-COHABITATION. I,. , the petitioner in the above-entitled matter, first being duly sworn, say: I have not cohabited with since . Date.