Validate PO Receipts file Supplier Remark (F43121.VRMK) field to Purchase Order

We are using F43121.VRMK field to store bill of lading number(BL#) against a PO. This piece of data is very important in our reports. It is an alphanumeric field and might contain some special chars too.

So, in order to avoid data entry mistake, is there any way to validate this information against a UDC or any filed in PO.

One super inventory user will enter this mapping (PO#, BL#) before first receipt and the receipt user will select this mapping.