Security tape (or security label) is a type of adhesive tape used to help reduce shipping losses due to pilfering and theft. It helps reduce tampering or product adulteration. It is often a pressure sensitive tape or label with special tamper-resistant or tamper-evident features. It can be used as a security seal in addition to a container closure or can be used as a security label. They are sometimes used as or with authentication products and as an anti-pilferage seal.
Security tapes and labels are sometimes used in conjunction with security envelopes.