Dear Mr. XYZ,
It had been a pleasure having an opportunity to meet with you (dated…) to talk about the proposed loan for the (cause of loan).
After reviewing the alternatives you suggested, I believe that it becomes best to collateralize that loan with (form regarding collateral).
I am instructing my officials to get ready a package consisting off necessary documents and to mail these to your attention today. I would be most appreciative when you would arrange to achieve the loan documents drawn immediately.
I cordially thank you for your cooperation within this matter and also looking towards the continuance of mutually beneficial relationship between us and our Company’s.