Some buyers can use an offer letter mortgage to qualify for a home loan before starting their new job. Here's how offer letter loans work.At a minimum, the letter should show a clear, noncontingent job offer. It needs to outline your salary and start date for the new position. The lender asked for an offer letter, and said the job Offer that I accepted on is too contingent to use. HR says they don't know, but are going to ask payroll. First time home buyers can have a loan talk with our community experts and discuss their home loan related issues in mortgage loan forum. Thinking of Buying a New Home? Find out What Documents Do You Need To Apply For A Mortgage and What Do Lenders Look For. How does the mortgage underwriting process work?