The mortgage holder can usually initiate foreclosure anytime after a default on the mortgage. Within the United States, there exist several types of foreclosure. Two are widely used, with the rest being possibilities only in a few states.

The most important type of foreclosure is foreclosure by judicial sale. This is available in every state and is the required method in many. It involves the sale of the mortgaged property done under the supervision of a court, with the proceeds going first to satisfy the mortgage, and then to satisfy other lien holders, and finally to the mortgagor. Because it is a legal action, all the proper parties must be notified of the foreclosure, and there will be both pleadings and some sort of judicial decision, usually after a short trial.

The second type of foreclosure, foreclosure by power of sale, involves the sale of the property by the mortgage holder not through the supervision of a court. Where it is available, foreclosure by power of sale is generally a more expedient way of foreclosing on a property than foreclosure by judicial sale. The majority of states allow this method of foreclosure. Again, proceeds from the sale go first to the mortgage holder, then to other lien holders, and finally to the mortgagor.

Other types of foreclosure are only available in limited places and are therefore considered minor methods of foreclosure. Strict foreclosure is one example. Under strict foreclosure, when a mortgagor defaults, a court orders the mortgagor to pay the mortgage within a certain period of time. If the mortgagor fails, the mortgage holder automatically gains title, with no obligation to sell the property. Strict foreclosure was the original method of foreclosure, but today it is only available in New Hampshire and Vermont.