# CRP20239

Source: https://xmlvalid.com/rules/CRP20239

> El campo ImpSaldoAnt debe mayor a cero.

- 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:Pago/pago20:DoctoRelacionado`
- Test: `mx:dec(@ImpSaldoAnt) gt 0`

In English: A related document's previous balance (ImpSaldoAnt) must be more than zero.

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