How to verify the validity of a Polish residence permit (Karta pobytu) online?
Many professional and personal processes today require you to verify an identity card online: recruitment, real estate rentals, KYC, customer onboarding, and more.
When documents are sent as scans or photos, it becomes difficult to distinguish an authentic ID from a modified or artificially generated document.
Our solution allows you to automatically verify an identity card from a simple image or PDF, using MRZ reading, check-digit validation, and data consistency analysis.
In just a few seconds, you receive a reliable result and a detailed report, helping you speed up your workflows while reducing fraud risks.
Which elements are validated during the Polish residence permit (Karta pobytu) validity check at the “Standard” level?
Full MRZ reading and validation
We automatically perform OCR reading of the MRZ zone, then verify and validate all extracted information along with the associated security check digits.
This makes it possible to confirm data consistency (document number, dates, identity) and quickly detect errors or attempted tampering.
Which elements are validated during the Polish residence permit (Karta pobytu) validity check at the “Plus” level?
The document number of the Polish residence permit
The document number of the Polish residence permit follows an official ministry pattern, including a security key calculated according to ICAO standards: we verify that the entire set is valid.
Enriched data with the “Id Plus” section
With the Plus analysis level, your identity verification is enriched with additional information grouped in a dedicated “Id Plus” section, available both in the web application and in PDF / JSON / XML reports.
This advanced analysis cross-checks MRZ data with the document’s personal information, providing a more complete view of the verified identity and strengthening the detection of inconsistencies.
Web app “Id Plus” section
PDF report “Id Plus” section
Advanced Forensic Analysis with the “Pro” level
With the Pro analysis level, verification goes beyond MRZ data: the system also analyzes the uploaded file itself to detect manipulations invisible to the naked eye.
This forensic analysis includes in particular:
– extraction and analysis of file metadata
– document integrity verification
– detection of modified documents or files generated from templates (Photoshop, recomposed scans, etc.)
Even if the MRZ is valid, altered or artificially created documents are identified thanks to these advanced checks.
Forensic analysis runs in parallel with MRZ reading, and results are available within seconds in the web application as well as in the detailed report.
All common formats are supported: images (JPG, PNG, WebP…) and PDF documents.
Results are grouped in a dedicated “Forensic” tab, with detection scenarios and integrity indicators, helping you quickly identify document fraud attempts.
The “Forensics” tab of the detailed Pro-level report
Video demonstration of the Forensic analysis for the “Pro” level
How does the online validity verification of the Polish residence permit (Karta pobytu) work?
After your purchase is confirmed or after you sign up, you will receive an email with your login details to access our identity verification web app (please check your spam folder if needed).
In just a few simple steps, you can verify an ID card or any other official document directly online.
1. Access the web app
Log in to your secure workspace using the credentials you received by email.
From your dashboard, select “Verify an identity document”.
2. Upload your document
Upload the scan or photo of the identity document (front/back), in an image format (JPG, PNG, WebP…) or PDF.
No preparation is required: the system automatically detects the document orientation as well as the MRZ area.
3. Automatic document analysis
The platform instantly performs:
– OCR reading of the MRZ
– validation of security check digits
– data consistency checks (document number, dates, identity…)
– forensic file analysis (Pro level)
This step quickly detects inconsistencies, input errors, and potential document fraud attempts.
4. Instant results and detailed report
Results are displayed immediately as a status (passed / failed), along with a complete report available in PDF, JSON, or XML.
Each field is detailed: recognized data, check digits, information consistency, and integrity indicators.
Reports remain available in your history and can be deleted at any time (privacy-friendly).
5. Credits and account management
Credits are deducted only when the MRZ is successfully detected.
You can check your balance at any time and subscribe to a plan that matches your analysis volume.
Example: verifying an identity document
The front and back of the ID card are shown in the video example below, but please note that only the back (with the MRZ) is required to analyze a document.
Support and guidance
Have a question or a specific need? Our support team is available by email or via the built-in help interface.
Additional resources (guides, FAQ, documentation) are also available to help you.
For professionals
Do you want to integrate identity document verification into your business workflows (KYC, onboarding, recruitment, compliance)?
We offer subscription plans tailored to professional needs, as well as a complete solution to analyze identity documents and PDF files through our web app.
Common use cases
Recruitment & onboarding
Quickly validate a candidate’s identity before signing a contract and reduce fraud risks.
Real estate rental
Verify the authenticity of documents provided by a tenant and secure your application files.
KYC & compliance
Automate identity verification to meet regulatory requirements while speeding up your checks.
Signing up for an online service
Check users’ age and identity for sensitive platforms.
B2B relationships & partnerships
Secure your collaborations by validating the identity of legal representatives.
How are the results of the Polish residence permit (Karta pobytu) validity verification presented?
The analysis results are available for download from the identity suite history in PDF / JSON / XML formats:
What document formats are accepted?
You can send your documents as jpg / jpeg / png images or as PDFs.
Scans/photos do not need to be cropped or edited: they are detected automatically.
It is possible to send both front and back of the document in the same scan and in any order (front first and back below, or vice versa): they will be sorted and recognized without issue.
Similarly for tilt: scans can be slightly tilted or misaligned; the Polish residence permit MRZ band will be correctly recognized by our service!
Am I charged if the information is not correctly extracted during the Polish residence permit (Karta pobytu) validity verification?
No. You are never charged as long as the MRZ of the Romanian ID card has not been correctly detected and analyzed.
Billing applies only to successfully recognized documents — meaning when the data can be automatically extracted, validated, and verified.
If the photo quality is low or some characters are not properly detected, you can manually correct the fields to obtain a reliable analysis — with no credit loss.
👉 Result: zero risk of unnecessary charges, and a verification process you can always rely on.
Discover the full workflow in the video below:
What is the MRZ band of the Polish residence permit (Karta pobytu)?
An automatic reading zone, or optical reading zone, is an area on an official document reserved for reading, identifying, and validating that document.
Thus, documents such as passports, national identity cards, residence permits, and driving licenses may or must contain, depending on countries and document versions, an optical reading zone.
It is located in the lower part of identity documents: it contains all information present on the document with security keys allowing to verify their authenticity and that they have not been modified.
The information found there varies depending on the document type.
How is it composed?
The MRZ band of residence permits issued from 2011 contains three lines of text, each containing alphanumeric characters.
What data is extracted from the Polish residence permit (Karta pobytu) validity verification?
The data extracted from the MRZ band are as follows:
- First line:
- Document Type: 2 characters, code indicating the document type.
- Issuing Country: 3 characters, the ISO 3166-1 alpha-3 code of the issuing country.
- Card Number: 11 characters, unique card number.
- Check Digit: 1 character, check digit of the unique card number.
- End of line: chevrons « < » to complete the line.
- Second line:
- Date of birth: 6 characters, year, month and day of birth in YYMMDD format.
- Check Digit: 1 character, check digit of the date of birth.
- Gender: 1 character, « M » for male, « F » for female.
- Expiration Date: 6 digits, expiration date of the card in YYMMDD format.
- Check Digit: 1 character, check digit of the expiration date.
- Country Code: 3 characters, ISO 3166-1 alpha-3 code of the holder’s nationality.
- End of line: 11 characters, chevrons to complete the line.
- Check Digit: 1 character, check digit of the concatenation of characters from lines 1 and 2.
- Third line:
- Holder’s last and first names: holder’s last and first names, starting with the last name followed by the first name. The last and first names are separated by two < characters. In the case of a compound last name, compound first name, or multiple first names, they are separated by the < character. Spaces and apostrophes are replaced by the < character and the name is truncated to 30 characters if needed, and any accents on letters are removed. The line is then completed by the < character.
Personal data & privacy
Protecting your data is a top priority.
After downloading the report, you can immediately delete the analysis from your secure account history. This gives you full control over your documents and personal information.
By default, all data is automatically deleted after 3 months, in line with GDPR best practices.
Our platform is designed to ensure the confidentiality of uploaded documents and the security of all processing — whether for occasional or professional use.
👉 Find all details about personal data management on our dedicated page: Privacy Policy.
Terms and Conditions
Service usage terms, billing information, and your rights are detailed in our Terms and Conditions.
👉 View the full Terms and Conditions here: TrustDocHub T&C.
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