Mortgage approval can be canceled after the fact for various reasons – mostly hinging on capacity, credit or collateral.  The most likely reasons can be loss or change in your job. New facilities on your credit bureau once funded can take away up to 50 points from your credit score – as these will impact your capacity as well. Appraisals coming back short where you cannot make up the difference with a bigger down payment from your savings, or the disclosure of the property previously being used for illegal activity are the simplest way to lose out due to issues with your collateral. It is advised that you get professional advice with regard to the property through your realtor; as well as using a solicitor early in the stage if you’re purchasing a condo.