A batch or lot code connects a product to a production run. Its job is traceability: it helps a manufacturer identify a group of products made together.
Two brands can print equally short-looking codes and mean completely different things by them. One may encode part of a date; another may use an internal production reference. That is why a code has to be read with the brand that issued it, not with a generic pattern alone.
When a brand format is known, a code may provide manufacture-date context. It can help compare two items from the same line. It does not replace a printed best-before date, prove where an item was sold, or establish whether it is genuine.
The distinction between a trade-item identifier and a batch reference is also made in the GS1 General Specifications →
Why the brand must come first →
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