CRP20105

El campo FormaPago no se debe registrar en el CFDI.

In English A payment receipt has no FormaPago: the form of each payment is FormaDePagoP.

error: the document is invalid

What the rule checks

As the rule set's publisher wrote it. The rule runs on every element the context matches, and fails where the test is false; the validator reports the line of that element.

Context
/cfdi:Comprobante[@TipoDeComprobante = 'P' or cfdi:Complemento/pago20:Pagos]
Test
not(@FormaPago)

Checked with CFDI 4.0