- Since July 28, 2026, Colombia’s National Tax and Customs Directorate, DIAN, has required users of the Electronic Invoicing System’s “Buscar documento” function to enter the identification number of either the document issuer or recipient. The same number must be entered again before the validated document can be downloaded.
- DIAN is also blocking bots, automated processes and AI agents when their activity could overload the search service or threaten information security. Affected users may see “Solicitud bloqueada por controles de seguridad”, but this does not constitute an access suspension. Normal navigation resumes after completing a human-verification check.
- Businesses using automated tools to retrieve Colombian electronic invoices, payroll support documents or equivalent documents should assess the operational impact and update their retrieval processes. The tighter controls may require additional manual verification, secure handling of taxpayer identification numbers and contingency procedures for invoice validation, reconciliation and document archiving.
Source Comarch
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Summary
- Colombia’s tax authority (DIAN) added an identity-verification step to the“Buscar documento” (Search document) tool in its electronic invoicing system, effective 28 July 2026. [europe.tho…euters.com]
- Users must now enter the issuer’s or receiver’s identification number to look up a document, and re-enter it to download — a measure aimed at protecting taxpayer information. [europe.tho…euters.com]
- DIAN has also begun blocking automated traffic (bots and AI agents); affected users see a“Solicitud bloqueada por controles de seguridad” message and a human-verification check, without access being suspended. [europe.tho…euters.com]
Extended article
Colombia’s DIAN has reinforced the security of the document look-up function in its electronic invoicing system. From 28 July 2026, a new validation mechanism applies to the“Buscar documento” (Search document) option: the system asks for the identification number of the invoice issuer or receiver when a user looks up a document, and requires the same number to be entered again to download it. The measure is designed to protect the security of taxpayer information. DIAN has also started blocking automated traffic — robots, automated processes and artificial-intelligence agents — that could overload the look-up service and pose an information-security risk. Where such traffic is detected, users may encounter the message“Solicitud bloqueada por controles de seguridad” (Request blocked by security controls). Access is not suspended: the system presents a check to confirm the user is human, after which normal navigation continues. DIAN frames the update as part of the technical controls needed to keep the platform functioning properly and has asked users and taxpayers to factor in the change.
🔗 Thomson Reuters – Regulatory updates: Colombia [europe.tho…euters.com]
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