# CRP20111

Source: https://xmlvalid.com/rules/CRP20111

> Solo debe existir un Concepto en el CFDI.

- 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: `/cfdi:Comprobante[@TipoDeComprobante = 'P' or cfdi:Complemento/pago20:Pagos]`
- Test: `count(cfdi:Conceptos/cfdi:Concepto) = 1`

In English: A payment receipt has exactly one Concepto.

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