A merchant ID (MID) can be assigned by your bank to identify each of your payment locations, and the payments made at each of those locations. But how does this work when you use a payment facilitator (like PayPal)?
If you use a payment facilitator, you remove the need to create and maintain your merchant IDs with your bank, but it can mean that your transactions end up on a shared MID with many other merchants. If FIdel is unable to differentiate between locations (through the use of other metadata), we are unable to use the shared MID with your program.
We are working with the card schemes to resolve all of the shared MID issues, and will be able to process all transactions on these Merchant IDs soon.