In Florida, offer letters are typically sent to all prospective hires immediately following a verbal job offer. Employment Offer Letter Instructions.A sample letter offering a job contingent upon the results of a background check or other criteria. Customer: Who should sign an offer letter first? The employer or employee? Need help drafting a job offer letter? Follow these step-by-step instructions to create job-offer letters that reduce legal risks. Links to sample letters are included. Decide if you prefer to negotiate. The offer letter can include your employment terms, including salary, benefits and PTO.