Guatemala (GT)

Documents

Code	Scope	Length	Check digit	Confidence
GT_DPI	personal	13	mod-11 weighted	moderate
GT_NIT	tax	2-13 (1-12 base + verifier)	mod-11 weighted	moderate

GT_DPI — Documento Personal de Identificación / Código Único de Identificación

Overview

National personal identity document issued by RENAP. The 9th digit is a mod-11 verifier; the trailing 4 digits encode departamento (01-22) + municipio. Persona natural may use the DPI/CUI in lieu of NIT for FEL invoicing post-2022.

• Issuer: RENAP — https://www.renap.gob.gt/
• Composition: 8 digits correlativo + 1 digit verifier + 2 digits departamento + 2 digits municipio
• Visual format: 0000 00000 0000
• Legal basis: Decreto 90-2005, Ley del RENAP

Algorithm

mod-11 weighted, weights [2, 3, 4, 5, 6, 7, 8, 9] LTR over the first 8 digits. The verifier (9th position) equals sum mod 11. RENAP does not issue DPIs whose computed verifier would be 10, so that result is treated as invalid.

weights = [2, 3, 4, 5, 6, 7, 8, 9]
sum     = sum(digit[i] * weights[i] for i in 0..7)
r       = sum mod 11
valid iff r != 10 AND r == digit[8]
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Sources

• RENAP portal: https://www.renap.gob.gt/
• Decreto 90-2005, Ley del Registro Nacional de las Personas
• Cross-validated against community DPI/CUI validators in the Guatemalan fintech ecosystem

Synthetic test vectors

valid:
  - 1234 56789 0101
  - 9876 54322 0101
  - 1000 00002 0101
  - 0000 00019 0101
  - 5555 55550 0101
  - 1122 33449 0101
  - 2000 00004 0101

invalid (format):
  - "" (empty)
  - 1234 (too short)
  - 12345678901011 (too long)
  - ABCDEFGHIJKLM (non-digits)

invalid (checksum):
  - 1234567800101
  - 1234567810101
  - 9876543200101
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Open questions

• RENAP does not publish the verifier formula in a citable public document. The algorithm is consistent with DPIs issued in production. Confidence remains moderate.
• Departamento/municipio code validation (positions 10-13) is not enforced by this spec — only length and the mod-11 verifier. Add a follow-up if a canonical RENAP table becomes available.

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GT_NIT — Número de Identificación Tributaria

Overview

Tax identifier issued by SAT for both persona natural and jurídica. The DV may be a digit 0-9 or K. Body length varies (typically 6-9 digits + verifier).

• Issuer: SAT — https://portal.sat.gob.gt/portal/
• Composition: 1-12 digits body + 1 verifier (0-9 or K)
• Visual format: 0000000-D (hyphen separates body from verifier)
• Legal basis: Reglamento de Factura Electrónica en Línea (FEL)

Algorithm

mod-11 weighted with weights 2, 3, 4, ... applied right-to-left over the body. The verifier is computed as:

sum = Σ (body_from_right[i] * (i + 2))   for i = 0..n-1
r   = (-sum) mod 11
dv  = "0123456789K"[r]
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Equivalently: dv = 11 - (sum mod 11); if the result is 11 use '0'; if 10 use 'K'.

All-same-digit body sequences (e.g. 1111111-1) are rejected as placeholder values.

Sources

• SAT FEL technical addenda: https://portal.sat.gob.gt/portal/
• Cross-validated against python-stdnum stdnum.gt.nit

Synthetic test vectors

valid:
  - 1234567-9
  - 9876543-4
  - 87654321-2
  - 12345678-9
  - 100-7
  - 12-4
  - 37-K            (DV computed as K)

invalid (format):
  - "" (empty)
  - X (single character)
  - ABCDEFGH (non-digits)
  - 12K34 (K outside the verifier slot)
  - 12345678901234 (too long, body > 12 digits)

invalid (checksum):
  - 1234567-0
  - 9876543-0
  - 37-1
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Recent reforms

• 2022 (FEL régimen) — Persona natural may submit their CUI/DPI in the NIT field. Callers handling FEL submission should additionally validate as GT_DPI when the value matches a 13-digit pattern.

Open questions

• SAT publishes the FEL XML schema but no numbered article spelling out the verifier formula. The algorithm matches python-stdnum and SAT-certified billing providers in production. Confidence remains moderate.

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GT_PASAPORTE — Pasaporte

Overview

Travel document issued by the Instituto Guatemalteco de Migración (IGM), with civil-registry inputs from RENAP. The IGM 2024 numbering update (per Copa Air carrier notice) is documented but the exact regex was not extractable from the published PDF.

• Issuer: IGM — https://igm.gob.gt/requisitos-para-tramite-de-pasaporte-guatemalteco/
• Composition: 8-9 alphanumeric (lenient)
• Visual format: contiguous chars

Algorithm

None on the printed number. MRZ check digit lives in algorithms/icao-9303.ts.

Confidence

low — IGM has not published the 2024 numbering spec in machine-readable form.

Sources

• IGM: https://igm.gob.gt/requisitos-para-tramite-de-pasaporte-guatemalteco/
• Copa Air notice (Jul 2024 PDF): https://www.copaair.com/assets/Update-in-the-numbering-of-Guatemalan-passports.pdf