Level 15

"The question was still, should I contact that contractor?"

You would do this to notify the person that the info is considered wrong by the IRS, and you have them bring their letter that provides the official notice of their FEIN (or SSN card). And that would only matter if you are hiring them again. I would flag the current W-9 and any file you maintain for that person that this condition exists, before working with them next time.

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"Level Up" is a gaming function, not a real life function.