# What is NIT?

The NIT is Colombia's tax ID. It has 9 digits and one check digit, and it is often written with the check digit attached. The business register and the state's supplier register both carry it, which is how Testigo joins them. The tax office's list of fictitious suppliers is keyed by NIT too.

- Manufacturers in Colombia: the public record explained: https://testigomexico.com/guides/public-record-colombia
- DIAN's list of proveedores ficticios, explained: https://testigomexico.com/guides/dian-proveedores-ficticios-colombia
- Check a Colombian supplier by NIT: the DIAN list: https://testigomexico.com/check/colombia
- How to check a supplier in Latin America before you visit: https://testigomexico.com/guides/check-supplier-latin-america
- Glossary: the words behind every record: NIT (Número de Identificación Tributaria): https://testigomexico.com/glossary#nit


Cite as: Testigo, "What is NIT?", https://testigomexico.com/questions/what-is-nit, data file 2026-10-12.

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This is the Markdown version of https://testigomexico.com/questions/what-is-nit. Testigo: Testigo is supplier intelligence for people who source from Latin America: a search over manufacturers taken from the official public registry of each country. Each record shows its source, its date and what was not checked.