When a coupon issued by a manufacturer is accepted at a till, the retailer has given away money that someone else promised. Recovering it is a separate process with its own economics.

Two kinds of coupon, two kinds of cost

A retailer's own coupon simply reduces what the retailer collects, and the cost falls entirely on it. No settlement with anyone else is required.

A manufacturer coupon is funded by the brand, which means the retailer accepts a shortfall at the till and must claim it back afterwards.

The distinction is invisible to the shopper but determines everything about how the coupon is handled once it has been used.

Clearing houses sit between the parties

Retailers do not claim from each manufacturer individually. Redeemed coupons are sent to a clearing agent that sorts them, validates them and aggregates claims.

The agent bills each manufacturer for its own coupons and pays the retailer the face value plus an agreed handling allowance.

That handling allowance exists because processing a coupon costs real money, and it is why the small print specifies a fixed amount per coupon redeemed.

Terms on the coupon are contract language

Phrases about void where prohibited, cash value, one per purchase and reimbursement addresses are not consumer instructions. They define the terms of the claim.

The nominal cash value exists because a coupon must have some value to function as an instrument in certain jurisdictions, even if that value is negligible.

Handling rules also protect against a retailer submitting coupons for products it never sold, which is the main form of loss in the system.

Digital redemption removed most of the handling

Coupons loaded to a loyalty account clear electronically, with the redemption recorded at the till and settled through data rather than physical transport.

This removes sorting, shipping and counting costs, and it removes the possibility of a coupon being applied to the wrong product because the system validates the basket.

It also produces a complete record of who redeemed what, which is why manufacturers moved to digital distribution faster than shoppers did.

Why funding source shapes the offer

Manufacturer-funded coupons are usually product specific, because the brand is paying and will only fund its own goods.

Retailer-funded offers are more often basket-wide, since the retailer benefits from the whole transaction rather than from any single line.

Recognising which type an offer is explains its shape, its exclusions and why it may be honoured differently across shops selling the same product.