ID Copy Tracer
Before you hand over a photo of your ID, hide the recipient's name inside it. If the copy turns up somewhere it shouldn't, check it here to see who you gave it to.
Nothing is kept here. No accounts, no uploads. Your photo never leaves your phone. Why I made this
This name is hidden inside the image. Accents take extra space, so "Hoa" fits more than "Hòa".
Recommended. Survives being re-saved, shrunk and sent through chat apps.
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Every copy you mark is locked to this word, and only this word can read it back. It's kept on this phone. Write it down somewhere safe so you can check copies on another device too.
Use a different secret word
Copies you've already made keep their old word, so note it down before changing.
Filled in from this phone. Change it if the copy was marked on another phone with a different word.
Screenshots, re-saved and shrunk copies work on their own. Cropped copies need your original photo above. Very small or heavily edited copies may not work.
Every copy you make is listed here, on this device only. If you clear your browser data, this list goes too, but the names stay hidden inside the copies themselves.
Why I made this
People in Vietnam are finding out that someone has used their ID card to sign them up for things they never agreed to. Organ donation. Loans they now get chased for. It can start with an ID photo you handed to a landlord, a phone shop or a lender, which then ends up with the wrong person.
A loan someone takes out in your name without your consent isn't your debt under Vietnamese law. Proving that is up to you, though. A copy marked with the name of whoever you gave it to is something concrete to show the lender and the police.
I built this so you can protect your own copies before you hand them over. Nothing is kept here. No accounts, no uploads, and your photo never leaves your phone while you use it. I just want it to be easier to look after yourself.
An example
- Before you send it
Minh Anh at ABC Bank asks you to email a photo of your ID, so you type "Minh Anh, ABC Bank" into the app, make a marked copy and send that one instead.
- Months later
A debt collector rings about a loan you never took out, which someone opened using your ID.
- Get the copy they used
Ask the lender for the ID image they were given, or ask the police handling your report to request it.
- Check it here
Add it under "Check a leaked copy". The app shows "Made for Minh Anh, ABC Bank" and the date you sent it, so you know which copy leaked and can take that to the bank and the police.
PassMade for Minh Anh, ABC Bank · 31/10/2026
This only works if the copy you sent is the one that got reused, because a fresh photo of your physical card carries no mark. ABC Bank is a made-up name.
Where your photo goes
How it works
Hidden mark. The recipient's name and the date are hidden inside the photo. You can't see them, but this page can read them back with your secret word.
Visible stamp. A faint line of text across the card, like "Chỉ dùng cho Shop ABC". It makes a stolen copy hard to reuse for a loan or a sign-up, and the hidden mark still works underneath.
Nothing is uploaded. Your photo is processed on your own phone and only saved where you choose. Once it's on your home screen, it works without internet too.
Terms and privacy
Terms of use
Last updated 8 November 2026.
Privacy notice
Last updated 8 November 2026.
Add it to your home screen
On Android, tap Install below, or open the browser menu and choose "Install app" or "Add to Home screen".