My mother sister and I purchased a house in Washington, DC, in 1991. My father did not want to be on the loan or title at that time, but now that we are refinancing, we are being told that he needs to be on the title, along with our spouses who we were not married to at the time that the house was purchased. My question is, do they have to be on the title, or just sign a document stating that they are aware of the refinancing?