Even if the payer is claiming the Standard Deduction, he can still report the amount of Mortgage Interest he paid on his tax return. It will show on Schedule A, even if Schedule A is not filed. It's possible he does not have an SSN, but an ITIN, or does not file a tax return?
Perhaps he doesn't know how much of his payment is interest and principal, or does he have an amortization schedule that outlines those amounts for him?
If so, possibly you can convince him to give his SSN if you tell him you can't Efile your return without it. He may get credit on his state return for reporting the interest he paid. If you can't get his SSN from any other sources, you will need to mail your return, properly reporting the income.
Here's more info on Unable to Obtain SSN from Payer.
@jencas
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
