First, the 1099 can't be released if they don't have a SSN/EIN to apply the receipts against. Secondly, if you are not subject to the IRS and you get one, correspondence could be sent to them with a corrected form showing no monies applicable to a tax liability were actually received.
This could be followed up by a FOIA letter you send to their Philadelphia, demanding evidence of a verified and completed assessment. They are supposed to answer the FOIA request within 21 days and when they do, they tell you, in writing, there is no assessment on file. You then have point blank evidence, from the IRS, that they are full of it, and they drop their tax claim. Just one way to beat back the tax gestapo.