Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started.Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started. We're Here When You Need Us ; Grow Financial Federal Credit Union ATTN: Proof of insurance P.O. Box 89639. Florida also has many resources for defendants who are representing themselves in a credit card debt lawsuit. Hardship Letter outlining your circumstances (form enclosed for your convenience).