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STEMMA · POST
AGREEMENT
Tiers, rebates, caps
PURCHASE ORDER
Keyed in by hand
INVOICE
The supplier’s system
THREE-WAY MATCH
Approved to pay
THE GAP
Every step checks the one before it.
None of them checks the agreement.
Post · 19 October 2026
The agreement nobody reads after it’s signed
The agreement says what you should pay. The invoice says what you’re asked to pay. In most businesses, nothing sits between the two.
Johannes Haug
·
5 min read
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