@FuzzBuzz - - The lending institution is required to issue Form 1098 only to the payer of record. The payer of record is the individual carried on the institution's books and records as the principal borrower. See page 3 of this reference:
https://www.irs.gov/pub/irs-pdf/i1098.pdf
In whose name was the 1098 issued during the six years in which you made all the payments? During those years who (if anybody) deducted the mortgage interest?
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
