Hello actually all ps4 controllers have the serial number underneath, I would like to send it to the repair shop but there's no serial number there's nothing
Did you buy it used or have you used it for a long time?
He was at the ps4 i have been using it for a long time but where the things should be is just black like the rest
It is quite plausible that it has worn out, and that happened a lot on the PS3 controllers.
Presumably wear and tear from use.
There's a sticker on the bottom that can wear off over time, especially if used carelessly.