What is reseal verification?
In short: A check of sealed product, before you buy or open it, for signs that it has been opened and resealed. The finding is consistent with factory-sealed, not consistent, or inconclusive, with photographs.
Resealed boxes are a real problem in sealed product: packs are searched or swapped, then the box is shrink-wrapped again to look new.
A reseal verification checks the box against what factory product should look like: weight against reference, the seal and shrink pattern, the pack map where it applies, and photographs of each step. It is a flat fee per box, in person or from the seller's photographs with that limitation stated. It is most valuable before money changes hands. The photographs are kept under the retention and consent policy.