1. They add a number, a dot, or an extra letter
The easiest fake is my real handle with something small stuck on: a number at the end, a dot in the middle, an extra letter. It reads as a typo. It isn't.
2. They call themselves my "backup account"
The four accounts on my links page are the only ones I vouch for. Anything claiming to be my backup, private page or second page isn't me. If a bio says it's a new account because the old one got banned, next to my pictures, it isn't me.
3. They repost my stuff as if it were theirs
Copying my pictures and captions takes about ten seconds. An account like that usually exists to collect followers and then send them somewhere off the app where nobody can report anything.
4. They message you first
I don't slide into your messages asking for money or gift cards. An account that calls itself AB BAE or abbey but has a different handle is a stranger, however much it looks like me. My only account on X is @buffalobillsbae, no underscore, no numbers.