Peppol and the 5-corner model
In short: Peppol is the international network standard the UAE chose for e-invoicing, and the "5-corner model" describes who touches each invoice: (1) the supplier, (2) the supplier's accredited provider, (3) the buyer's accredited provider, (4) the buyer — and (5) the Federal Tax Authority, which receives the invoice data from the providers. The UAE calls this a Decentralised Continuous Transaction Control and Exchange (DCTCE) model.
The design decision that matters: businesses never connect to the tax authority directly. Everything flows through accredited providers (corners 2 and 3), who validate, exchange and report. “Decentralised” means many providers rather than one government portal; “continuous” means data reaches the FTA transaction-by-transaction, not in periodic returns.
For a business, the model sets the project shape: pick a provider, integrate your systems with it, and make your documents valid — the network does the rest. Related: ASP · PINT AE · Peppol ID.
Reviewed: 26 Oct 2026 · by SHORIQ