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.Enter the date of the Offer Letter. Then enter the name and address of the potential employee who is being offered the position. Offer letters typically spell out the new hire's position, who they will report to, their start date, when and how much they will be paid. Customer: Who should sign an offer letter first? The employer or employee? An agreement, written or verbal, is a contract. You've signed it, so you've agreed to it, and you should look carefully at what you've agreed to. However, nothing is legally binding until an employment contract is signed.