As a first step, a copy of your license file may already be saved on your server’s hard drive. Check the location:
C:\Program Files\PaperCut NG\server\application.license
Mac OS X:
This file is your digitally signed license and can be used to enable/license PaperCut on other servers (e.g. your new server).
If you have lost your PaperCut license file (or PaperCut license key for legacy versions), and have been unable to retrieve it from your HD or backups, please send an email to firstname.lastname@example.org requesting that it be re-issued. You should send the email from an official domain of your organization, or from the email address you used to purchase PaperCut; this will help us with verification.
For information on installing your license file, please see: https://www.papercut.com/kb/Main/InstallingLicenseFile
Keywords: licence, resend, re-send, re-issue