--- title: "SEFAZ e-invoicing (NF-e, CT-e, MDF-e) GTIN registry check extended to construction materials from September 1, 2027: 2027-09-01 | Harbyn" description: "SEFAZ e-invoicing (NF-e, CT-e, MDF-e) GTIN registry check extended to construction materials from September 1, 2027, effective Sep 1, 2027." canonical: "https://harbyn.com/changes/sefaz/2026-09-25-gtin-validation-rule-changes" last-updated: 2026-10-09 --- # SEFAZ e-invoicing (NF-e, CT-e, MDF-e) GTIN registry check extended to construction materials from September 1, 2027 Markdown version of . Behavior change - SEFAZ e-invoicing (NF-e, CT-e, MDF-e). medium severity. Announced. Upcoming. NT 2021.003 v1.50 adds Group V (construction materials NCM codes) to the NF-e checks that the informed GTIN exists in the Centralized GTIN Registry (CCG). Test environment from April 1, 2027; production from September 1, 2027. 311 days left: the deadline is Sep 1, 2027. ## Facts | Fact | Value | | --- | --- | | Vendor | [SEFAZ e-invoicing (NF-e, CT-e, MDF-e)](https://harbyn.com/vendors/sefaz.md) | | Kind | Behavior change | | Severity | medium | | Status | Announced | | Announced | Sep 25, 2026 | | Effective | Sep 1, 2027 | | Added to Harbyn | Oct 9, 2026 | | Lead time | 327 days of warning | | Review | Reviewed by a person, extracted by a model | ## Find it in your code ```sh npx harbyn scan ``` This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses SEFAZ e-invoicing (NF-e, CT-e, MDF-e), from its packages and API hosts. Nothing leaves your machine. ## Sources Where this event comes from: the page we read, when we read it, and the hash of that snapshot. - (changelog, fetched 2026-10-09 06:16 UTC, sha256 `8db407db282789572cb15ff30c7f13cd1e5dd77b59e52a65cf15d15c7c960ec7`) ## Related changes ### More from SEFAZ e-invoicing (NF-e, CT-e, MDF-e) - [Amazonas NFC-e accepts CFOP 5.949 for tips](https://harbyn.com/changes/sefaz/2026-09-25-validation-rule-changes.md) (Behavior change, effective Oct 5, 2026) - [BP-e net value field and total value rule change on November 16, 2026](https://harbyn.com/changes/sefaz/2026-10-01-bp-e-layout-and-validation-updates.md) (Behavior change, effective Nov 16, 2026) - [CT-e drops EPEC and FSDA contingency on November 16, 2026](https://harbyn.com/changes/sefaz/2026-10-01-ct-e-ct-eos-and-gtv-e-layout-updates.md) (Breaking change, effective Nov 16, 2026) - [NF-e referencing an NFC-e or CF-e rejected from December 14, 2026](https://harbyn.com/changes/sefaz/2026-10-01-danfe-simplificado-tipo-2-for-in-person-and-remote-sales.md) (Behavior change, effective Dec 14, 2026) ### Changes at other vendors - [VTEX: Master Data public-field restrictions](https://harbyn.com/changes/vtex/2026-10-23-master-data-public-field-restrictions.md) (effective Oct 26, 2026) - [NFS-e Nacional: vAjusteBC group added in restricted production](https://harbyn.com/changes/nfse-nacional/2026-10-20-criacao-do-grupo-vajustebc.md) (announced Oct 20, 2026) - [Conta Azul: New client\_id format for new applications](https://harbyn.com/changes/contaazul/2026-10-01-novo-formato-de-client-id-para-novas-aplicacoes.md) (announced Oct 1, 2026) - [Asaas: Alteração na estrutura de URLs públicas do Asaas](https://harbyn.com/changes/asaas/2026-09-25-alteracao-na-estrutura-de-urls-publicas-do-asaas.md) (effective Sep 28, 2026) [All upcoming deadlines](https://harbyn.com/deadlines.md)