Seller finance difference between appraisal and offer with FHA??

[Ryan Newport]

FHA loan product.

If my appraisal came in at say, 250k, but seller insisted on wanting 275, can I seller finance an additional 25k.

Does FHA allow this? I know they specifically do not allow seller to finance a down payment, but I am providing my own down payment, closing costs, and reserves. Thing is, they won't fund a larger loan with the low appraisal.

If FHA doesn't allow this, can this type of arrangement be made with seller on the side with seller in form of a promissory note or something else?

Not looking for tips on switching to a conventional loan, getting another appraisal, appealing appraisal, or negotiating purchase price. Already trying all these tactics as well.

Thanks!