Agree with Dan (as usual) - talk to your legal department.
Our Special Assets department has done some creative financing to work with borrowers (although this is outside of my expertise). Maybe they have set them up, but I assume it would be under a written agreement with the borrower.
Contact the head of your special assets department and discuss with legal.
Best of luck.
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The opinions expressed are mine, do not represent the opinions of my employer, and they are not to be taken as legal advice.