# Detect tampered and deepfake Certificate of No Impediment (CNI) > A certificate of no impediment states that no legal obstacle to a marriage was found after the applicant's details were publicly displayed for a notice period, and it is verified through its issue date, its validity window, and the legalisation attached to it. It is the document that lets someone marry abroad, which means a forged one can produce a genuine foreign marriage certificate and a spousal visa behind that. TamperCheck reads the certificate and its apostille as one file. **Canonical URL:** https://tampercheck.ai/documents-support/certificate_of_no_impediment **API document class:** `certificate_of_no_impediment` **Last updated:** 2026-10-07 --- ## What a genuine certificate of no impediment contains A certificate of no impediment is a short statement with a long list of dependencies. It carries the applicant's full name, date of birth, nationality, and address, the marital status being declared, the name and nationality of the intended spouse, the country where the marriage is to take place, the date public notice was given, the date the notice period expired, and the name, signature, and seal of the registrar or consular officer who issued it. An issue date and an expiry date follow, and most arrive with an apostille or consular legalisation attached. Everything on it is anchored to dates. The certificate cannot be issued before the notice period ends, and its expiry is a fixed interval after issue, so the three dates form a sequence that breaks when one of them is moved. The apostille is a separate certificate with its own number, date, and issuing authority, and it authenticates the signature on the document beneath it, so it cannot be dated earlier than that document. A declared status of divorced or widowed points to a decree or a death record that has to exist. ## How certificate of no impediment forgeries are made ### Marital status edit A declared status is changed from married, divorced, or widowed to single, which is the whole point of the document and the whole of the forgery. Everything else stays genuine, so nothing on the page contradicts it, and the change shows only as a localised difference in how that phrase was rendered. ### Issue date extension An expired certificate is re-dated so it falls back inside its validity window. The issue date is bracketed by the notice dates above it and the expiry below it, so moving it alone leaves a sequence that no longer runs, and moving all three multiplies the evidence of editing. ### Apostille fabrication The legalisation block is copied from another document or invented outright. An apostille carries its own serial number, date, and issuing authority, and a transplanted one can end up dated before the certificate it supposedly authenticates, or naming an authority with no jurisdiction over the officer who signed. ### Registrar signature lift The issuing officer's signature is taken from a scan of a real certificate and placed on a new one. A lifted signature reproduces exactly, stroke for stroke, across every document from the same source, which no hand-signed run of certificates ever does. ### Consular letterhead imitation Certificates issued by embassies and consulates are imitated because few foreign registrars see them often enough to recognise the genuine layout. Imitations usually get the crest and the typography approximately right, and the seal, the reference format, and the officer's title block wrong. ### Documents for jurisdictions with no standard form Some countries issue no standard certificate at all and a notarised affidavit stands in its place. That gap is filled with documents produced from scratch, leaving nothing authentic to compare them against and putting the weight of the check on the seal, the notary block, and the substrate. ## What TamperCheck checks on a certificate of no impediment TamperCheck runs 200+ forensic checks across three layers and returns a risk score from 0 to 100 with plain-English findings tied to specific regions of the document. These three carry the most weight on this document class. ### Embossed seal analysis A physically embossed seal deforms the paper it sits on. A seal that was scanned and reprinted is flat, and the two separate cleanly under analysis even when they are hard to tell apart by eye. ### Signature forgery analysis Signature regions are assessed for ink consistency and for how the stroke sits on the page, which distinguishes a genuine pen stroke from a pasted image of one. ### Date and validity consistency Issue, expiry, and period dates are checked against one another and against the file's own creation metadata, which catches backdating and validity extension. ### And many more checks The three above are the layers that carry the most weight on a certificate of no impediment. Every upload runs the full suite of 200+ checks regardless of document class, spanning file structure and metadata, pixel-level forensics, font and text rendering, optical and print characteristics, provenance signals, AI-generation signatures, and many more checks. ## Who verifies a certificate of no impediment, and why Registrars and consulates processing overseas marriages. In each case the document is being used to unlock money, access, or a legal status, which is exactly what makes it worth forging. ## How to verify a certificate of no impediment in 4 steps 1. **Check the fields against each other.** Read marital status declaration, issue date, and registrar signature together rather than one at a time. Forgers typically change one value and leave the rest of the document describing the original. 2. **Inspect the file metadata.** Open the document properties and look at the producer, creation date, and modification date. A document produced by a consumer PDF editor, or created long after the date printed on its face, is worth a closer look. 3. **Ask for a second document.** Request a corroborating document from the same issuer or an adjacent period. Forgery effort concentrates on one file, so inconsistencies surface as soon as there are two to compare. 4. **Run a forensic check.** Manual review catches obvious edits but not field-level pixel manipulation or synthetic generation. TamperCheck runs 200+ forensic checks on a certificate of no impediment and returns a risk score from 0 to 100 within seconds, at $0.50 per document. ## Frequently asked questions ### How do authorities verify a certificate of no impediment? They check the date sequence and the legalisation, then go back to the issuing office. The certificate has to be issued after the notice period ended and presented inside its validity window, and the apostille or consular stamp has to name the right authority and carry a date no earlier than the certificate it authenticates. Foreign registrars then confirm the issuing office exists and issues in that form. ### Can a single status certificate be faked? Yes, and the edit is usually one word: a declared status changed from married or divorced to single. Because the rest of the certificate is genuine, nothing else on the page contradicts the change, and the forgery survives a visual check comfortably. Forensic analysis catches it as a localised difference in the way that field was rendered compared with the text around it. ### How long is a certificate of no impediment valid? Validity is set by the issuing authority and by the country where the marriage will take place, and three to six months from the issue date is typical. Because the window is short, re-dating an expired certificate is one of the more common forgeries on this document, and it leaves the issue date inconsistent with the notice dates above it and with the legalisation attached to it. ### Does an apostille mean the certificate underneath it is genuine? No. An apostille certifies that the signature and seal on a document belong to the official who signed it, and it says nothing about whether the statement in the document is true. It can also be copied from another file, so treat it as a second document to be checked, with its own serial number, date, and issuing authority, rather than as proof of the first. ## Related document types - Birth Certificate: https://tampercheck.ai/documents-support/birth_certificate - Death Certificate: https://tampercheck.ai/documents-support/death_certificate - Marriage Certificate: https://tampercheck.ai/documents-support/marriage_certificate - Divorce Decree: https://tampercheck.ai/documents-support/divorce_decree - Domestic Partnership Certificate: https://tampercheck.ai/documents-support/domestic_partnership_certificate - Police Clearance Certificate: https://tampercheck.ai/documents-support/police_clearance --- Try TamperCheck now: https://tampercheck.ai/dashboard · Docs: https://tampercheck.ai/docs · Pricing: https://tampercheck.ai/pricing