Qr Codes Do They Divulge Any Personal Information?

On a technical note: the two-dimensional barcode attached to stamps by postal some postal authorities, technically, are not QR-codes.

@NSK

I receivede letters with an Attached QR code, it it not a barcode.

@NSK

This letter is with a datamatrix I receivede letters with the QR code also, but have not savede any I think the ones with QR- code might hold company information as you can sign up and use QR codes to use in your company.

Letter with a datamatrix



QR Code and Barcode



I think there is more codes.

Viking,
When I scan your bar code it came back with this;

0210324074136;8900;332800;8560201305;89590861;8560;497;773;572;3221;;

Don

@Don

I do not know what the barcode have of information, But I know that 8560 is the postal code for my area I bought some stamps in Sweden.

Did you try the QR-Code?

A little more information of different types of codes.

What you show is an item of mail with and affixed label carrying a code. That is not a QR-code. Your other examples are. Hint: the corners of the code area and not the dimensions make a difference when it comes to QR-codes.

What I wrote was a two-dimensional barcode attached to stamps:




I am not sure which rod222 referred to. But below is a recent (well 7 years old already) development. This is not a QR-code. A number of European countries use these barcodes (France, Germany, GB).

@Don,

You refer to a 'barcode.' I am not sure which you refer to.
The QR-code for the 20 Ore Red Viking123 posted on page 1 directs me to this image:

@NSK

It looks like the Datamatrix code.

Seems like there can be different use of the codes. Read about the QR-Code the Canadian postal service made a survie and attached a QR-code to letters.

Found this:

"What is a Data Matrix code used for?

Data matrix codes are used extensively to label small electronic and industrial components, but they are also used widely in many different industries, including food and beverage, aerospace, pharmaceutical, defense, mail, and print media because tracking and traceability are critical in these industries "

@NSK

The picture from the QR-Code is the 20 øre Red position 100, known by the red line unde RE. The QR-Code is good to use if you have a large file a Sheet of 100 stamps and you want to keep the details.

That is the correct name, indeed. Post offices use these to keep track of the status of the stamp. Once scanned, the code is deleted from the list of available stamps. In theory, this should prevent the reuse of stamps that have no cancellation mark and identify forged stamps. At the same time, it allows attaching information such as destination to the mail item.

Some people on this site consider that if the postal authorities do not apply a cancellation mark, they are telling them they may use the stamp again.




Nice use of technology.

NSK,
The bar code that I scanned was this one;


I agree that the barcode that Rod showed decodes to the jpg image you show.

FYI,
During my career, I was project leader for a number of barcode scanner development projects with Symbol Technologies and Motorola. I scanned this code with one of the scanners we developed and built in our facility. I am familiar with the scanner technology, barcode technology, and the firmware which decodes the barcodes.
Don

I wondered whether you referred to that one.

My Samsung S10 does nothing with that barcode.

@NSK

It has been a great day, I learned something new about a subject that I never thought of.

Cleaver way to use the datamatrix by the mail, nice item you showede with QE II

The firmware in the scanner I used can decode 23 different bar codes types, it also omnidirectional and can decode a barcode in any orientation (which was new tech back when we did this about 20 years ago...LOL).


This is a tiny USB scanner, about 2.5 inches long.
Don

@51Studerbaker

Nice device 20 years ago, scanners probably use the same technology today, the QR-code I think dates back to 1994.