My mortgage lender says they need an acceptance letter, not an offer letter. I have no clue the difference, and google has not been helpful.Ask for an offer letter. Candidates accepting offers must sign a statement at the bottom of the offer letter, indicating acceptance and understanding of the conditions of the offer. An employment offer letter should be typed (or emailed) and written in businesslike language. In Philadelphia, the "offer" is in the form of a contract which could be binding if the seller accepts. However, an offer letter is not the same thing as a contract. An offer letter refers to the information package you receive regarding financial aid and what institutional aid you qualify for at the particular college. Many companies make offer letters when they're interested in hiring an applicant for the position. First, an offer is a contract.