# Tamper-Evident Packaging: Why an Approved Seal Is Not Compliance _A federal rule asks for an outcome rather than a part, lists twelve features that can meet it, then says using one of them does not by itself make a package compliant._ **The short answer** **A federal rule asks for tamper-evident packaging, and it sets no test for it.** The rule names an outcome: a shopper must see that someone opened the pack. **An approved feature is not a passing grade.** The compliance guide lists twelve that can work, then says using one does not by itself comply. A pack can carry an approved seal and still fail the rule that asks for it, because the approved list and the compliance question are not the same thing. The gap is where specs go wrong. The rule covers over-the-counter drugs sold at retail, and states its demand as an outcome rather than a part. A feature must show the shopper that someone opened the pack. What the rule does not carry is a test. The agency weighed measurable standards and turned them down on the record, so no score and no pass mark exist anywhere in it. That leaves a compliance guide with two lists. Twelve features can meet the rule, and a set of close cousins cannot, each one with a reason attached to it. This reference covers what the rule asks, how it defines distinctive, why an approved feature is not a grade, and what the guide rules out. - **4 exempt** - Dermatological, dentifrice, insulin, lozenge - **12 features** - On the acceptable list - **2 or 1** - Features for unsealed or sealed capsules - **No test** - The agency declined to set one ## What the Rule Asks For The rule reaches over-the-counter human drug products on a retail shelf, and a product that misses it counts as adulterated or misbranded under the Act. Four product types sit outside the rule and carry no obligation at all. For the rest the rule asks for indicators or barriers to entry, so a broken or missing one leaves the shopper able to see that someone opened the pack. The feature also has to survive the trip, staying intact through normal handling on the way to the shelf, which rules out anything that often arrives looking disturbed. And the pack has to name what it uses, in a statement placed so that breaking the feature does not carry the statement off with it. ## Distinctive by Design Is a Defined Term The rule asks for more than a seal, since the pack must look distinctive by design or carry a mark of its own. A mark of its own can be a pattern, a name, a registered trademark, a logo or a picture. Distinctive by design has a [defined meaning](https://www.ecfr.gov/current/title-21/chapter-I/subchapter-C/part-211/subpart-G/section-211.132), and it turns on copying rather than looks. The test asks whether common materials and processes could reproduce the pack. That wording did real work, and it cost tinted films their place, because a tint marks nothing once the tint or a copy reaches the open market. Which turns the choice into a supply question rather than a graphics one. > Figure: The list gets a spec through the first gate, and the second gate is the one with no protocol behind it. ## An Approved Feature Is Not a Passing Grade A [compliance guide](https://gmp-compliance.org/files/guidemgr/2011_CPG_450_500.pdf) from 1988 carries the working list, and it reads like a menu of twelve families, from film wrappers through to aerosol cans. One line above that menu changes how to read it, because the guide says using one of these does not by itself comply. So the list answers a narrower question than it appears to, ruling out families that cannot work while leaving open whether a given build does. The line usually falls inside a family rather than between families, and tape seals sit on both lists at once, with the difference lying in how the tape holds. | Family | On the acceptable list | Ruled out, and the stated reason | | --- | --- | --- | | Film wrapper | Film wrappers | Cellophane with overlapping end flaps, since a reopened flap need not show; tinted film | | Shrink band | Heat shrink bands or wrappers | Cellulose wet shrink seals, widely understood; tinted bands | | Mouth seal | Container mouth inner seals | Foam seals held by pressure-sensitive adhesive, which can return to their first state | | Tape seal | Tape seals | Tape relying on adhesive alone | | Carton | Sealed cartons | Cartons closed by gluing the end flaps | | Capsule seal | Sonic welding, banding, solvent or low-heat sealing | A sealed capsule alone, which the guide says is not a package | ## What the Agency Rules Out, and Why Each rejection carries a reason, and the reasons share one shape: the guide rules out any feature that can return to its first appearance after someone opens it. Overlapping end flaps fail on that basis, as do foam mouth seals held by adhesive, and tape that leans on adhesive rather than a self-destroying build. Two rejections concern the statement rather than the seal, since labeling on a bottle cap fails where someone could swap in a plain cap. A statement living only on a package insert does not replace one on the label either. Capsules get their own arithmetic, and it is the clearest number here, because an unsealed two-piece capsule needs two features while a sealed one needs just one. That trade sits behind the sealing methods the guide names, among them sonic welding, banding, and sealing with solvents or low heat. ## There Is No Test, and That Is Deliberate Buyers hunting for the protocol will not find one, and the [record](https://www.govinfo.gov/content/pkg/FR-1998-11-04/html/98-29388.htm) explains why, because the agency weighed measurable standards and found the drawbacks outweighed the gains. Its reason is worth reading twice: fixed criteria might rank the methods too early, so the agency judges the outcome and uses no rigid checklist. The wording shift in 1998 followed the same logic, since the older term pointed at the packaging rather than at the shopper. The agency also put the ceiling in writing, saying no packaging or dosage form is tamper-proof, and labeling that implies otherwise fails on its own terms. The history behind that line is unsparing. A 1982 case in which seven people died after taking contaminated capsules produced the original rule. A 1991 case then took two more lives, from a pack that met the standard and visibly showed that someone had opened it. So a spec carries three jobs rather than one. Pick a family the guide accepts, pick a build that cannot return to its first state, and write the statement so a breach cannot remove it. Neighboring regimes differ, since UN certified packaging treats the closure as part of a tested build, and a box manufacturers certificate makes a claim a lab can check. Consensus standards exist where the agency wants them, and ASTM D4169 is one it accepts, which makes tamper evidence the exception. Commercial pressure pulls the other way, since Amazon packaging certification rewards a box a customer opens in seconds. ## Common Questions ### Is tamper-evident packaging required by law? For over-the-counter human drug products sold at retail, yes. A product that misses the rule counts as adulterated or misbranded under the Act. ### What is the difference between tamper-evident and tamper-resistant? The agency changed the wording in 1998. It judged that the older term pointed at the packaging and implied something hard to break into, while the newer one points at what a shopper can see. ### Is there a test for tamper-evident packaging? No. The agency weighed performance standards and turned them down, finding the drawbacks outweighed the gains and that fixed criteria might rank the methods too early. It judges the outcome instead. ### Does sealing a capsule make the package compliant? No. The guide says a sealed capsule is not a package, so it still needs a feature around it. An unsealed two-piece capsule needs two features; a sealed one needs one. **How to weigh this page.** The requirements come from the current federal rule, and the reasoning and dates from the 1998 final rule. The two feature lists come from a compliance guide issued in 1988 and revised in 1992. That guide still uses the older wording, so this page claims nothing about how every item would be judged now. No source names a test or a pass mark, and each rejection appears as the agency's conclusion. **Key takeaways** - The rule states its demand as an outcome: a broken feature must leave the shopper able to see that someone opened the pack. - Twelve feature families can meet the rule, but the guide says using one does not by itself comply. - Rejections turn on one property, that a feature can return to its first appearance after someone opens it. - Distinctive by design means common materials and processes cannot copy the pack, which is why tinted films lost their standing. - No test or pass mark exists because the agency turned one down, not because nobody got round to it.