Its all to do with Responsible Lending legislation. Lenders have a responsibility to ensure they lend responsibly, not only when they lend to you but on an ongoing basis. These monthly checks are to see if you have suddenly gone out and acquired a whole lot of new loans which is regarded as an indicator of financial stress.Just had a look at my credit file. Is there a reason why Amex would access your file each and every months? Heard someone mentioned they experienced the same problem and whether this impacts the credit file in any way?
File Access's are recorded (as you can see) against your credit file but don't "impact" in the sense that they are not used in assess credit-worthiness or disclosed to other credit providers when you make an application.