Receipt space is expensive real estate. We prioritize a single next action — scan, stamp, or visit an endcap — rather than stacking three URLs nobody will type.
We test contrast assumptions on thermal paper, not glossy mocks. Faded QR codes are a loyalty killer; we specify minimum module sizes per printer family common in Korean hypermarkets.
When retailers insist on legal boilerplate, we carve a predictable zone so loyalty lines do not shrink to illegible grey.
After pilot, we compare redemption lift against a control set of stores that kept legacy copy. Results feed the next copy rotation, not ego.