I was going through some old records today, and came across my very first service dog letter! It is dated Dec 15, 2005. I started using Sabrina as my service dog earlier that year. I got this letter in order to take Sabrina on my first family vacation with a service dog! We flew to Louisiana to visit family. The letter wouldn’t work for flying today, though it would be appropriate for a general letter of support for your files.
The letter reads “Veronica Morris is my patient. I am treating her for a chronic medical disability. Veronica uses a service dog to assist her in managing this disability, and I support her in doing so. Please accommodate Veronica and her service dog as needed.”