I would ask the potential Borrower as to why there were two numbers on the credit report. This could be a possible ID theft situation. I would also review the credit report very carefully. Are there any alerts on there which would indicate identity theft? I would also recommend obtain two forms of ID from this customer for your file. I would also call the credit bureau and ask them why there were two numbers on the credit report. You can then compare all this information and see if it makese sense. Once again, document every step you go through.
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"100 victories in 100 battles isnt the most skillful. Subduing the other's military w/o battle is the most skillful." Sun-Tzu