If part of your mortgage deposit is a gift, the lender may ask for a mortgage gift letter confirming the funds are not a loan. Downloadable template.The gift letter for mortgage should be completed and provided to the conveyancing solicitor along with the gifter's proof of ID, address and proof of funds. The letter must explain who is gifting the money, where the donor's funds are coming from and the relationship between the donor and the recipient. Learn how to write a gift letter for a mortgage lender in the UK. Use the template to ensure your gifted deposit meets lender requirements. Generate a letter for a deposit coming from a family gift. This would be used with proof that the deposit exists (eg a bank statement).