Tampering is when someone tries to interfere or pry-open a product. Anti-tampering procedures and mechanisms have been used since the beginning of time using everything from waxed seals to today's tamper proof labels and security devices.
Tamper evident seals and other types of tamper proofing have been popular to keep consumers safe for several years. However, one of the most famous incidents that prompted these tamper evident labels and style of seals was the Tylenol poisoning in the 1980s. Ever since that tragic incident, tamper proof labels was never the same again.
Sometimes more than one type of tamper proof labels and labeling systems are used to insure the product can't be tampered with in any fashion. It just depends on the type of product and the levels of protection needed.
Some of the kinds of tamper proof labels may include:
*    Security tape such as evidence tape
*    Tamper evident labels that show if someone has removed them
*    Security holograms
*    Special inventory labels
*    Labels resistant to solvents so bar codes can't be removed
*    Security Seals like tamper wire and tamper bolts for securing barriers
*    Thermal Transfer Labels for shipping to ensure no one disturbs the contents before it gets to the customer