Before you blame the store
A short package isn’t always the same crime.
Shortweighting is real, and it costs shoppers real money at scale, but “this is short” and “here’s who did it” are two different questions. Get the second one wrong and you file a complaint with the wrong agency, or blame a cashier for a factory’s mistake.
Every short-weight complaint traces back to one of three places. Here’s how to tell which one you’re actually looking at.
The register or deli scale
The store's fault: a device/procedure violation
Weighed-at-checkout items (deli meat, bulk bins, produce) require the container, tray, wrap, or ice to be tared out before pricing. If it isn't, you're charged product price for packaging. This is a scale-configuration and staff-procedure failure at that specific location: not a manufacturing issue, and not really a 'weight' violation at all under NIST's tolerance tables. It's binary: either tare was zeroed, or it wasn't.
How to tell: Weigh the empty packaging yourself after the fact and subtract it from the charged weight. If the gap is large and the receipt gives no sign packaging was excluded, this is what happened.
The manufacturer's packaging line
The maker's fault: a net-weight violation
Pre-packaged goods (a bag of chips, a bacon package with a fixed net-weight statement already printed on it) are filled and sealed before they ever reach a store shelf. If the package is short, the line that filled and labeled it is where the shortfall happened. The store just sold what it was shipped. This is what NIST Handbook 133's tolerance tables are actually built to catch.
How to tell: This is exactly what /check measures: the printed label vs. what's actually inside, regardless of which store you bought it from.
Nobody: normal batch variance
Not a violation: the law expects this
No packaging line fills every unit to the exact gram. NIST's Maximum Allowable Variation tables exist because regulators already accounted for real-world variance. A small shortfall on an individual package is expected and legal, as long as it's inside the table for that quantity and the batch averages out to the label.
How to tell: This is the Domino sugar case: about an ounce under a 2 lb bag, and still inside the legal allowance. Short isn't automatically illegal.
Retail shortweighting is a real, documented pattern: Walmart alone has paid out a $45 million nationwide settlement and additional state-level settlements over sold-by-weight items. That’s not in dispute. What’s harder, and what most viral videos skip, is that a single short package doesn’t tell you whether you caught a systemic scheme, a bad shift at one store, a factory running hot that week, or nothing at all. The tolerance tables exist precisely because the honest answer is usually more boring than the headline, and the boring answer is the one a state investigator actually needs to act on your complaint.
That’s the whole point of checking the actual math instead of trusting the vibe of a video, yours or anyone else’s.
Got a specific package? Find out which one it is.
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