| Country | Name of identifier |
| Albania | NIPT |
| Saudi Arabia | VAT Registration Number / TIN |
| Argentina | CUIT (Clave Única de Identificación Tributaria) |
| Australia | ABN (Australian Business Number) |
| Bahrain | VAT Account Number |
| Bolivia | NIT (Número de Identificación Tributaria) |
| Bosnia & Herzegovina | JIB (Jedinstveni Identifikacioni Broj) |
| Brazil (companies) / (individuals) | CNPJ / CPF |
| Canada | BN (Business Number) |
| Chile | RUT (Rol Único Tributario) |
| China | Taxpayer Identification Number (TIN) |
| Colombia | NIT (Número de Identificación Tributaria) |
| South Korea | Business Registration Number |
| Costa Rica | NITE (Número de Identificación Tributaria Especial) / legal entity ID |
| United Arab Emirates | TRN (Tax Registration Number) |
| Ecuador | RUC (Registro Único de Contribuyentes) |
| Egypt | Tax Identification Number (TIN) |
| El Salvador | NIT |
| United States | EIN (Employer Identification Number) or SSN |
| Philippines | TIN (Taxpayer Identification Number) |
| Ghana | TIN |
| Guatemala | NIT (Número de Identificación Tributaria) |
| Honduras | RTN (Registro Tributario Nacional) |
| Hong Kong | Business Registration Number (BRN) |
| India | PAN (Permanent Account Number) / GSTIN (if registered) |
| Indonesia | NPWP (Tax Identification Number) |
| Iceland | Kennitala |
| Israel (individual) / (business) | Teudat Zehut / Osek |
| Japan | Corporate Number / Individual Number (My Number) |
| Kenya | PIN (Personal Identification Number) |
| Kuwait | Commercial Registration Number |
| North Macedonia | Tax Number |
| Malaysia | Business Registration Number |
| Morocco | IF (Identifiant Fiscal) |
| Mexico | RFC (Registro Federal de Contribuyentes) |
| Montenegro | PIB |
| Nigeria | TIN |
| Norway | Organization Number (Org.nr) |
| New Zealand | IRD Number |
| Oman | VAT Registration Number |
| Palestine | Tax Identification Number (TIN) |
| Panama | RUC (Registro Único del Contribuyente) |
| Paraguay | RUC (Registro Único del Contribuyente) |
| Peru | RUC (Registro Único de Contribuyentes) |
| Qatar | Commercial Registration Number |
| United Kingdom | UTR (Unique Taxpayer Reference) |
| Dominican Republic | RNC (Registro Nacional de Contribuyentes) |
| Russia | INN (Identifikatsionnyy nomer nalogoplatel’shchika) |
| Serbia | PIB (Poreski Identifikacioni Broj) |
| Singapore | UEN (Unique Entity Number) |
| South Africa | Income Tax Reference Number |
| Switzerland | UID (Unternehmens-Identifikationsnummer) |
| Thailand | Tax ID Number |
| Taiwan | Unified Business Number (UBN) |
| Tanzania | TIN |
| Turkey | Vergi Kimlik Numarası (VKN) |
| Ukraine | Tax ID (Individual) / EDRPOU (company) |
| Uganda | TIN |
| Uruguay | RUT (Registro Único Tributario) |