# NFE-924

Source: https://xmlvalid.com/rules/NFE-924

> Rejeição: Proibido referenciar Cupom Fiscal (refECF, a partir de …).

- Level: error
- Rule sets: SEFAZ authorisation rules of NF-e 4.00 MOC 7.0 Anexo I, NTs up to 2026.010
- Context: `nfe:infNFe`
- Test: `not($paperBanned and $refs/nfe:refECF)`

In English: From 5 October 2026 (1 September in homologação) an NF-e may not reference a fiscal coupon (refECF).

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