Dupe Detective
What happens if your store fails a price verification inspection?
Short answer
Inspectors check a sample of items at the register against the shelf or advertised price. Under the national procedure in NIST Handbook 130, a store passes when at least 98% of checked items ring up correctly. A failed inspection usually leads to a follow-up inspection, and repeated failures can bring fines. In North Carolina, for example, stores with an overcharge rate above 2% face penalties.
How the inspection works
State and local weights and measures officials make unannounced visits. They choose a sample of items, check the price shown on the shelf or in an ad, and scan each one at the register. The procedure most states follow is the Examination Procedure for Price Verification in NIST Handbook 130.
A store passes when at least 98% of the checked items ring up at the correct price. States differ on whether undercharges count against the store. North Carolina, for example, records undercharges but doesn't count them.
How often stores fail
In the 2024 National Price Verification Survey, inspectors in 26 states carried out 7,462 inspections at 7,367 stores and checked 419,237 prices. 23% of inspections failed. When only overcharges were counted, 12% would have failed. More checkout overcharge statistics.
What happens after a failure
Penalties depend on the state. A common pattern is a follow-up inspection, then fines if the store fails again.
North Carolina publishes its results. In the second quarter of 2025, 11 stores in 8 counties paid fines for overcharges. A Dollar General in Brevard had a 9.33% error rate, with 28 overcharges in a 300-item sample, and paid $3,715. A Circle K in Kernersville had a 5% error rate and paid $1,810. Read the NC press release.
Results like these often make the local news, which can cost a store more than the fine.
How to prepare
- Run your own price checks on the same kind of random sample inspectors use.
- Remove expired sale tags on the day a promotion ends.
- Fix the root cause behind repeat errors in the same category.
Read 7 ways to reduce checkout pricing errors. For the rules in your state, contact your state's weights and measures office.