Your license number in plain view
Roofing is where homeowners worry most about out-of-town crews that disappear after the check clears. In Florida, a certified roofing contractor's number starts with CCC, and anyone can look it up on the state's license search. Florida law requires it on your advertising, websites included.
How Atlas handles it: Give Atlas your CCC number and ask for it in the footer; it shows on every page.