Troubled loans are sometimes referred to as sour loans or non-performing loans. These are loans that a borrower cannot repay and is at least 90 to 180 days past due (depending on the type of loan and property).
If you have a problem loan – meaning you haven't paid on it in the time periods listed above – it can cause you to lose your house. You might have to sell some of your assets or file for bankruptcy in order to recover from this situation and pay back the problem loan.