If the physical sticker has rubbed off or is unreadable, you can retrieve the serial number digitally from any photo taken with that camera:
The serial number shown in the menu will always match the physical sticker. If they differ, the camera has likely had its main board replaced (which resets the electronic serial) without proper reprogramming—a potential red flag for used purchases. how to check canon camera serial number best
The best way to find the serial number is physically on the camera body. It is usually printed in one of three places depending on your model (DSLR, Mirrorless, or Compact). If the physical sticker has rubbed off or