Disclaimer Deed Can I Sign A Disclaimer Deed & Have It Revocked If I Change My Mind Aftr We Close On Our Property In Arizona?

Can I sign a Disclaimer Deed & have it revocked if I change my mind aftr we close on our property in Arizona? - disclaimer deed

Mortgage Coy has informed us that if you are a written warning, on a property that my husband and I are in my Z, that the title may change after the closure contain my name. Is that true? I really want to sign the act, but for purposes of obtaining a mortgage and home D I do? What are out there?