After being divorced for 3 years, my ex-wife gave me a Quitclaim Deed to sign, should i do it or what happens if i don’t sign?

If the house has always been in her name, (specifically the deed), she doesn’t really need you to sign the quit claim deed; however, many financial institutions (banks) require a Quit claim deed even if your final judgment of dissolution of marriage awards the house to her for instance if she were trying to sell or refinance that residence. Look at your final Order or call the attorney who handled your divorce.