The stickers on the PS Vita are notorious for fading due to the heat of the device and the friction of your palms while gaming. As soon as you get a Vita, and upload it to your cloud storage. This ensures you always have it, even if the physical label becomes unreadable.
If the device was formally registered via a warranty claim, the serial may be listed under the hardware details. Why You Need Your Serial Number
While this screen primarily shows your System Software version and MAC Address, it provides the unique identifiers Sony Support needs to verify your specific hardware if the physical serial is missing. 3. Look at the Original Packaging