As others have pointed out, the QR code itself does not expire. The qr code merely contains text data and often some indication of what the text represents (ie url, e-mail, phone number, icard, etc.)
Note that URLs often use URL shorteners or other indirection to keep the size of data inside of the qr code to a minimum. So, while the URL qr code itself does not expire an indirection that it uses might if it is provided by the printing service.
There is no point in guessing here. Merely decode the qr code and look at the actual text it contains. If your normal qr code reader does not show you this information then you can use a command line client such as zbarimg that will show you the actual text encoded in the qr code. If you don't like what the print shop encoded for you, you can create your own qr code using a tool such as qrencode, which can generate an image of the qr code in any size you choose. Then you have a pristine copy of the qr code to use for whatever purposes you choose. |
