IDNO (Numărul de identificare de stat) is the state identification number assigned to legal entities and organisations in Moldova. It doubles as the fiscal code used by the State Fiscal Service (Serviciul Fiscal de Stat) for tax registration, e-invoicing, and procurement.

How many digits is an IDNO?

An IDNO is 13 digits. The first twelve form the base number and the thirteenth is a check digit derived from them with a repeating 7-3-1 weighted, modulo-10 algorithm.

How is the check digit calculated?

Each of the first twelve digits is multiplied by the repeating weight pattern 7, 3, 1 (so positions cycle 7, 3, 1, 7, 3, 1, …). The products are summed and the sum is reduced modulo 10. The resulting digit is the expected thirteenth (check) digit.

Is the IDNO the same as the IDNP?

No. The IDNO identifies organisations (companies, NGOs, public bodies), while the IDNP (Numărul de identificare personal) is the 13-digit personal identification number for individuals. They share a length but are issued in different ranges and used for different subjects.

Is my IDNO uploaded anywhere?

No. Validation runs entirely in JavaScript inside your browser. Nothing is transmitted, logged, or stored, and the tool works offline once loaded.

Moldova IDNO Validator

Moldova IDNO at a glance

The IDNO (Numărul de identificare de stat — “state identification number”) is the unique identifier for legal entities and organisations in Moldova. It serves as the fiscal code for the State Fiscal Service and appears on tax registrations, e-invoices, and procurement filings. The IDNO is 13 digits, where the final digit is a check digit over the first twelve.

How it works

The check digit uses a repeating 7-3-1 weight pattern and reduces modulo 10:

weights pattern = 7, 3, 1, 7, 3, 1, 7, 3, 1, 7, 3, 1   (positions 0..11)
sum   = Σ (digit[i] * weight[i])
check = sum mod 10

The computed check must equal the thirteenth digit. The 7-3-1 cycle is the same family of weights used by several Eastern-European identifier schemes; reducing modulo 10 keeps the check digit a single decimal digit and catches the bulk of single-digit and transposition errors.

Tips and example

For base 100160000010, multiply digit by weight position by position (7,3,1 repeating), sum the products, and take the remainder modulo 10 — that remainder is the expected check digit. A passing check confirms the IDNO is well-formed; it does not prove the organisation is registered or active, so verify against the State Registration Chamber when the registration status matters.