Originally posted by Hydrogen
If you made the account on any of your consoles (PS3 or PS4) you can call Sony, and just send them your serial number ff the console and you'll get it back
Serial won't work all the time if that console isn't activated on that account trust me i been and done that you must have all the rest of the info on the account that Sony will ask for credit card on file mailing address, security question, Date of Birth, original email that was created on the account and should get it back with in a few hours.