Chess.com has very sophisticated cheat detection... and chess.com is a business! That means they're very motivated to avoid incorrectly banning people for cheating.
If your opponent reports you, and you didn't cheat, it's extremely unlikely anything will happen... like... a 1 in one million chance. You can confidently ignore that person.
Today I played a chess match. As i was in a tournament so the person i played against was very low rated than me. I almost defeated him and he resigned (obviously anyone would) then he message me.
"tu triches trop. ça se voit à mort. tes stats sont impossibles. you are a big cheater"
which mean "you cheat too much. it shows to death. your stats are impossible. you are a big cheater"
I asked him what he meant and around 15-20 minutes later he replied and said
"J ai demandé à chess.com ce qu ils en pensent. On va vite savoir. Bye bye chess.com for you" means "I asked chess.com what they think about it. We will quickly find out. Bye bye chess.com for you" I was like What !!
If I defeat someone does that mean I am a cheater?? Please tell me what I should do.
This is the link to that match - https://www.chess.com/game/live/34000259015