We can send you all serial numbers you have purchased if you know the e-mail address you bought them with.
If so, use the Find Your License page.

If you don’t remember the e-mail address that you purchased with or it’s no longer available, you will have to email [email protected]. Provide as much information as you can to help us find your license: previous email addresses it might be associated with, your name (or the name of who ordered it), when it was ordered, etc.

Tags: serial number, license, lost, missing