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. "Thank you," occurs to me to be a logical answer to your question. Offer letters are irrelevant in this context. What you absolutely must have is a contract with the agency that is specific to this assignment. To check the status of a job application, sign in to your profile and click on the "My Jobpage" tab to view completed submission. You have zero legal obligation to go to any job, except in very rare circumstances. You can be hired or quit at any time. Like your benefits and salary.. and confirm your start date as well.