In divorce situations, it is common, for the spouse who keeps the home to refinance to remove the other spouse from the loan. Equally as common, first-time buyers who don't have enough income to qualify may ask a parent to co-sign and must add their name to the mortgage.
Let's assume that you have owned your home for several years. It has increased in value and the unpaid balance considerably less than you originally borrowed. In short, you have equity in the home. You're thinking about buying another home and one of the questions going through your mind is "should we find a replacement property before we put our home on the market?