Gift-with-purchase and multi-buy deals look simple on a pitch slide. On the floor they collide with barcode logic, stock caps, and part-time cashier training.
Before locking a mechanic, walk it with a store ops lead. Confirm how the till will recognize the offer, what happens when gift stock runs out, and how returns are handled.
Sell-in sheets should show the retailer the labour cost of the promo, not only the upside. Honest mechanics get better compliance than optimistic ones.
When a promo is regional, print variants of the crew checklist. Northern stores may need different gift storage notes than mall locations in Bangkok.