Which format does Mexico use for e-invoicing?

CFDI 4.0. Documents go to SAT, through a certified PAC.

Does Oltrano control the invoice number in Mexico?

No, and no tool can. In Mexico the authority assigns the sequence; we record what it returns.

Is Mexico a clearance country?

Yes. The document is authorised by SAT, through a certified PAC before it is legally valid.

What is the Peppol EAS code for Mexico?

Mexico has no code in the official Peppol EAS list, so we do not guess one.

E-invoicing in MexicoCFDI 4.0

Every invoice is stamped by a certified provider before it is valid.

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The facts

What issuing in Mexico actually involves

Format	CFDI 4.0
Goes to	SAT, through a certified PAC
Regime	Clearance — the authority authorises the document before it is valid
Invoice number	Assigned by the authority, not by us — we record what comes back
Seller tax ID	RFC
Buyer tax ID	RFC
Peppol EAS code	Not in the official EAS list
Integration	Facturama

The part that costs a day

The catch nobody writes down

The stamp is the invoice. An unstamped CFDI has no legal existence, so "saved" and "issued" are genuinely different states — and cancelling after the fact needs the buyer to accept, which is a workflow most tools pretend does not exist.

The number is not yours here

The authority owns the sequence, so we step aside and record what comes back. Any tool that promises you full control of the number in Mexico is describing something that cannot happen.

Tax is computed from the base

Never extracted from the gross. The two formulas differ by a cent and the wrong one gets the file rejected. The leftover cent is declared as payment rounding (BT-114), where the standard puts it.

Straight talk

What we do not do in Mexico.

We do not hold your signing certificate, we do not file your periodic returns, and we are not your accountant.

Issuing here goes through Facturama, with your own credentials. We build the document, validate it, send it and record what comes back.