VPDS146000 | Vaping Products Duty and Vaping Duty Stamps: Duty stamps - approval: Security
From HM Revenue & Customs · Vaping Products Duty and Vaping Duty Stamps guidance
As part of the application process, you should ascertain:
what controls will be in place to safeguard the duty stamps
how will their issue for affixation be controlled
who will have access to the stamps
details of any audits to be undertaken on stamp stock holdings
procedures for dealing with lost or damaged stamps