Last updated: Sep 2026
From Aadhaar to PAN, India has many document and ID abbreviations. Here are 40+ full forms related to documents, IDs, and government identification systems.
Full List of Document & ID Terms
| Abbreviation | Full Form | Purpose |
|---|---|---|
| Aadhaar | Aadhaar (12-digit biometric ID) | Unique identification number in India (universal) |
| API | Application Programming Interface | Software tools for data exchange |
| AQN | Aisle Quotation Number | Reference number for certain documents |
| ATN | Attention | Used on envelopes/documents |
| BRN | Business Registration Number | Number for registered businesses |
| CADR | Confidentiality Agreement Disclosure Request | Legal document request |
| CA | Certificate of Authenticity | Certificate verifying genuineness of product |
| CIB | Central Information Bureau | Identity verification database |
| CNR | Case Number Reference | Court case identification number |
| CPF | Central Provident Fund (Singapore) | Savings and social security scheme |
| CRN | Customer Reference Number | Number identifying customer account |
| CTID | Customs Trade Identification Number | Customs identification for importers/exporters |
| CVV | Card Verification Value | 3-digit security code on credit/debit cards |
| DIN | Director Identification Number | Unique number for company directors |
| DNI | Documento Nacional de Identidad | National ID (Spain/Latin America) |
| DOB | Date of Birth | Birth date on documents |
| DPA | Data Protection Authority | Agency protecting data privacy |
| DRL | Driver's License | Driving authorization document |
| DTDC | Door to Door Courier | Courier tracking reference |
| ECN | Electronic Case Number | Digital court case reference |
| EMD | Earnest Money Deposit | Money deposited in tenders/contracts |
| EPF | Employees' Provident Fund | Social security retirement scheme in India |
| ESI | Employees' State Insurance | Social security scheme for workers in India |
| FDC | Form Data Certificate | Certificate for document authenticity |
| FIR | First Information Report | Police report documenting crime |
| FOIR | Form of Income Receipt | Document showing income sources |
| GID | Government ID | Any government-issued identification |
| GST Number | Goods and Services Tax Number | Business tax identification in India |
| HSN | Harmonized System of Nomenclature | Code for categorizing goods |
| IIN | Issuer Identification Number | First 6 digits of credit/debit card |
| KYC | Know Your Customer | Customer identification verification process |
| KRA | Key Result Area | Performance metric area |
| LRN | Legal Reference Number | Unique number for legal documents |
| MICR | Magnetic Ink Character Recognition | Code on bank checks for processing |
| NEET | National Register of Eligible Tenants | Tenant verification system (UK) |
| NIN | National Identification Number | ID number issued by government |
| OTP | One Time Password | Temporary security code for verification |
| PAN | Permanent Account Number | Tax ID number in India |
| PASSCODE | Personal Access Security Code | Security code for accounts |
| Portable Document Format | File format for documents | |
| PIN | Personal Identification Number | Security code for accounts/ATM |
| POI | Proof of Identity | Document verifying identity |
| POA | Proof of Address | Document verifying residence address |
| POR | Proof of Residence | Document verifying current address |
| PR | Permanent Resident | Immigration status allowing long-term residency |
| RRN | Reference Registration Number | Unique reference for government documents |
| SSN | Social Security Number | US tax and social security ID |
| TAN | Tax Deduction Account Number | Tax filing identification in India |
| TDS | Tax Deducted at Source | Tax withheld by payer |
| TIN | Taxpayer Identification Number | Tax ID for businesses |
| UAN | Universal Account Number | EPF account number in India |
| UIDAI | Unique Identification Authority of India | Agency issuing Aadhaar IDs |
| URN | Unique Reference Number | Unique identifier for documents |
| VIN | Vehicle Identification Number | Unique number for vehicles |
| VISA | Temporary Travel Document | Permission to enter another country |
Frequently Asked Questions
Q: What is the difference between Aadhaar and PAN?
A: Aadhaar is a biometric ID for all residents (issued by UIDAI). PAN is a tax identification number (issued by income tax dept). Both are required in India but for different purposes.
Q: What is OTP used for?
A: OTP (One Time Password) is a temporary security code sent via SMS/email. It's used to verify your identity during login or sensitive transactions (online banking, social media).
Q: Is KYC mandatory for bank accounts?
A: Yes, KYC (Know Your Customer) is mandatory for opening bank and investment accounts in India to prevent fraud and money laundering.
Q: How is Aadhaar used in daily life?
A: Aadhaar is used for: bank account opening, tax filing (linking to PAN), mobile phone SIM cards, government welfare benefits, and various verification processes.
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