Inspection stamps: the one mark that has to name a person
3 September 2026 ยท Estamplab
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Open the stamp maker and start from any of these
Most stamps record that something happened. An inspection stamp is different: the question it gets asked later is never whether the batch passed, it is who said it passed. A QC mark without an inspector identifier answers the wrong question.
Open the stamp maker and start from any of these
The four lines
1. The verdict. INSPECTED, PASSED, QC APPROVED, ACCEPTED. One word, large, readable across a workshop.
2. The inspector. A number or initials, not a name in full. This is the line that turns a mark into a record, and it is the line most templates leave off. When a customer comes back eight months later, the inspector number is what connects the part in their hand to a person and a shift.
3. The date. The date of inspection, not the date of manufacture. Those diverge and people assume they do not.
4. The reference. Batch, lot, work order or serial. See the batch number stamp creator for the numbering side of this, which is the part that has to be automatic.
Everything else on an inspection stamp is decoration.
Why the shape is usually a triangle or a hexagon
Not tradition. On a factory floor a mark is read at a glance and often upside down, and a shape carries at distances where text does not. A triangle reads as inspection in most manufacturing cultures, a hexagon as certification, and a circle as identity. Using a plain circle for a QC mark means somebody has to read it to know what it is.
The hexagon stamp and the quality control stamp are the two starting points, and the industry templates hold the rest.
The numbering problem
An inspection reference that repeats is worse than no reference, because two different parts then carry the same number and the record cannot resolve either of them. A rubber numbering stamp is turned by hand, which means it repeats the moment somebody forgets to advance it or advances it twice.
A digital stamp with a locked serial issues each number once, on the saved stamp, and cannot issue it again. That is the entire argument for the sequential number stamp generator, and it matters more in QC than anywhere else on this site.
Where inspection marks go now
Fewer of them land on the part and more on the paperwork: the inspection report, the certificate of conformity, the packing list, the release note. All of those are PDFs, and a rubber stamp cannot reach a PDF without a printer, a scanner and a loss of quality at both ends.
Stamping the file directly keeps the mark sharp and keeps the date honest. The goods received stamp and the shipped stamp are the two marks at either end of the same journey.
Read more: What a serial number has to guarantee to be worth anything
The related marks
- Goods received, at the inward dock. See the goods received stamp.
- Quality control, on the report. See the quality control stamp.
- Manufacturing, on the works order. See the manufacturing stamp.
- Shipped, at the outward dock. See the shipped stamp.
- Rejected, which needs to be as legible as the pass mark and usually is not. See the rejected stamp.
The honest limits
An inspection stamp is a record made by a person, and it is only as good as the inspection behind it. It is not a certification scheme, it does not carry accreditation, and where a regulated conformity mark is required the requirement comes from the scheme rather than from the stamp.
What it does is make an inspection traceable to a person, a date and a batch, on a document that will be read by somebody who was not there. Build one from the full list of stamp and seal types.
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