The letter will be fine as long as it says they were positive and are recovered. It does not have to state fit to fly.I'm having a hard time figuring out what to do. Is it possible to get a letter of recovery in time for our trip? Learn more about the rules and regulations of travel within or outside of the U.S., as well as recommended documentation to carry with you. Fill up your Personal Profile iii. Enter your Travel Details iv. The Substance Abuse and Mental Health Services Administration (SAMHSA) is the U.S. Department of. Need a COVID-19 Documentation of Recovery letter for travel? CDC has the requirements of what is needed on everyone's recovery certificate.