Rules
Unique, up to 30 characters; letters, numbers, periods, underscores.
Routes
Impersonation and intellectual property reports exist and need a real basis.
Tip
Keep it short for easy recall.
Official sources
Platforms change their help pages and forms often. Follow the wording on your own screen and the current Help Center. Usernm is an independent service and is not affiliated with Meta or any platform named on this site.