Dormy Inn
A chain rule, with the largest seals of any chain — when they are in stock
Dormy Inn answers this on every property’s own FAQ page in the same words: refused in principle, but a tattoo that a cover seal hides completely may bathe. The seals come in three sizes — 85×105, 100×140 and 118×172 mm (4.6×6.8 in) — and the rule is two per guest, so two large ones cover about 400 cm², nearly twice Route Inn’s single seal and more than three times APA’s pair. The Onyado Nono inns are the same company under another name and carry the same answer.
The same FAQ adds two qualifiers that matter: the seals are provided “depending on the facility”, and “stock is limited, so we may not be able to provide them”. Neither is a refusal, but neither is a promise. Bring your own seals of the right size and the rule works in your favor every time; arrive without and you are relying on the drawer at the desk.