If your Vita is running custom firmware (CFW), you can use an application like VitaTester or Spsident . These tools read the raw hardware IDs directly from the NAND (flash memory). This is the most reliable way to recover a lost serial number on a dead-sticker unit.
Are you trying to find the serial number for a , to identify the model (OLED vs Slim), or for another reason? Serial number checker - Sony check ps vita serial number
A way to look up Vita serial number without the sticker on PC. If your Vita is running custom firmware (CFW),
Checking and recording your serial number is essential for several reasons: check ps vita serial number