# NFE-852

Source: https://xmlvalid.com/rules/NFE-852

> Rejeição: Número da parcela inválido ou não informado [nOcor: …] (as parcelas são numeradas 001, 002, 003...).

- 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: `every $i in 1 to count($dups) satisfies string($dups[$i]/nfe:nDup) = format-number($i, '000')`

In English: Installments (dup/nDup) must be numbered with three digits in sequence: 001, 002, 003.

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