US EIN/TIN+SSN Validator
Validate US EIN, SSN and ITIN format & IRS prefix rules, mask SSNs and detect duplicate tax IDs.
Validate US EIN, SSN and ITIN format & IRS prefix rules, mask SSNs and detect duplicate tax IDs.
Key Features
EIN Prefix Validation
The validate_ein() engine checks that an Employer Identification Number has exactly nine digits and that its two-digit campus prefix (01-06, 10-16, 20-27, 30-39, 40-48, 50-59, 60-68, 71-77, 80-88, 90-95, 98-99) is part of the IRS-published valid-prefix set. Historically unassigned prefixes (00, 07-09, 17-19, 28, 29, 49, 69, 70, 78, 79, 89, 96, 97) and an all-zero serial body (NN-0000000) are flagged as invalid before the number ever reaches a filing. Every accepted EIN is re-rendered in the canonical NN-NNNNNNN format.
SSN Format Rules
validate_ssn() checks the area (first 3 digits), group (next 2) and serial (last 4) segments per SSA/IRS Pub 1346: area cannot be 000, 666 or fall in the 900-999 ITIN-reserved range, group cannot be 00 and serial cannot be 0000. A short list of publicly voided promotional numbers (the Woolworth wallet-card SSN 078051120, a 1962 advertisement number and a Lifelock CEO number) is rejected by default via reject_promotional. Valid values are re-rendered as AAA-GG-SSSS by format_ssn().
ITIN Group Range Checks
validate_itin() confirms that an Individual Taxpayer Identification Number starts with the digit 9, that its 4th-5th "group" digits fall inside one of the IRS ranges 50-65, 70-88, 90-92 or 94-99, and that the trailing 4-digit serial is not 0000. This keeps ITINs used for non-employee tax filings cleanly separated from the SSN and EIN number spaces.
Automatic Type Detection
detect_type() picks the most likely family for a bare 9-digit number: a leading 9 is treated as ITIN space, a valid EIN campus prefix that fails SSN structural checks is treated as EIN, and a value that passes SSN rules but not the EIN prefix list is treated as SSN. When a number is structurally valid as both, the more privacy-sensitive SSN interpretation is used. The Contact form, the audit log and the standalone wizard's "Auto-detect" option all rely on this same heuristic.
Privacy-Safe Masking
mask_ssn() and mask_ein() keep only the last four digits visible, rendering SSNs/ITINs as XXX-XX-1234 and EINs as XX-XXX6789. The computed us_tax_id_display field on the contact form applies this masking automatically whenever the "Mask SSN/ITIN in UI" setting is enabled (on by default), and the audit log always stores the masked form only — the raw digits are never persisted in tax.id.validation.log.
Duplicate Tax ID Guard
A stored, indexed us_tax_id_normalized field holds the digits-only form of every contact's Tax ID. The _check_us_tax_id_unique constraint searches across all vendors and customers for another partner sharing the same normalized number and blocks the save with the masked value and the conflicting contact's name. Duplicate enforcement is a company-wide toggle ("Enforce Unique Tax IDs" in Settings, backed by the us_tax_id.enforce_duplicate parameter) for organizations that need to allow shared IDs.
Standalone Validator Wizard
The tax.id.validator.wizard (menu Tax ID Validator — Validate Tax ID) lets any user paste an arbitrary value with or without dashes, either force a specific EIN/SSN/ITIN check or leave it on Auto-detect, and instantly see the detected type, valid/invalid flag, formatted value, masked value and the exact reason. A Clear button resets the form for the next check, and every run is recorded in the audit log with source "Validator Wizard".
Validation Audit Log
Every check — whether triggered by saving a contact, clicking "Validate Now" or running the wizard — is written to tax.id.validation.log with the masked value, detected type, valid/invalid result, human-readable reason, related contact, source (Contact Save / Validator Wizard / Manual API), validating user and timestamp. The Validation Log list view offers Valid/Invalid and EIN/SSN/ITIN filters plus group-by-type and group-by-user for compliance review.
Screenshots
Why Choose This Module
Bad taxpayer IDs are the #1 cause of 1099 e-file rejects. This module validates EIN, SSN and ITIN identifiers against real IRS structural and prefix rules before they ever reach a filing.
Specifications
- Compatible: Odoo 18.0 / 19.0
- License: OPL-1
- Languages: English
- Author: Pokutsoft
- Dependencies: base, contacts
- Support: support@pokutsoft.com
Update date: 2026-07-05
| Availability |
Odoo Online
Odoo.sh
On Premise
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| Odoo Apps Dependencies |
•
Contacts (contacts)
• Discuss (mail) |
| Lines of code | 826 |
| Technical Name |
us_ein_tin_ssn_format_validator |
| License | OPL-1 |
| Website | https://pokutsoft.com/odoo_plugins/ |
Odoo Proprietary License v1.0 This software and associated files (the "Software") may only be used (executed, modified, executed after modifications) if you have purchased a valid license from the authors, typically via Odoo Apps, or if you have received a written agreement from the authors of the Software (see the COPYRIGHT file). You may develop Odoo modules that use the Software as a library (typically by depending on it, importing it and using its resources), but without copying any source code or material from the Software. You may distribute those modules under the license of your choice, provided that this license is compatible with the terms of the Odoo Proprietary License (For example: LGPL, MIT, or proprietary licenses similar to this one). It is forbidden to publish, distribute, sublicense, or sell copies of the Software or modified copies of the Software. The above copyright notice and this permission notice must be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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