This is probably me being overly careful, but...
...On the check instructions (via https://www.uscis.gov/forms/filing-fees) it says: "6. Sign the check in ink using your legal name".
My signature that I use everywhere is "Kev Jones" written in cursive with some style. My full name is "Kevin Peter Jones". Should I use my regular signature there or just write "Kevin Peter Jones" in plain cursive writing?
(fyi: My real name is not actually Kevin Peter Jones, that is just an example name that fits this situation, since I don't want to put my real name here on a public forum)