# CRP20231

Source: https://xmlvalid.com/rules/CRP20231

> El campo CertPago no se debe registrar.

- Level: error
- Rule sets: SAT validations of CFDI 4.0 and Pagos 2.0 Matrices of 25 March 2026 and Pagos 2.0 rev. B
- Context: `pago20:Pagos/pago20:Pago`
- Test: `@TipoCadPago or not(@CertPago)`

In English: Without TipoCadPago, CertPago is left out.

Validate a document against these rules: https://xmlvalid.com/validate