CRP20104
El valor del campo Moneda debe ser "XXX".
In English A payment receipt has Moneda XXX: the currencies are in each Pago.
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
@Moneda = 'XXX'
Checked with CFDI 4.0