Help

The link check

We check the link of each changeable code about once a day, so you hear from us when a page stops working, before the people who scan your code do.

For code owners

• We visit the link the way a browser does. If the site does not answer, or answers with an error (like 404, the page is not there), the code shows a red line in My codes.
• You get one email when a link stops working and one when it works again, never one every day.
• Links of paused codes, and of plans that ended, are not checked.

For site owners

Our checker sends the User-Agent TrackedQR-LinkMonitor/1.0. It asks for a page at most about once a day for each code that links to it, first with HEAD and then, if needed, with GET, and it reads no more of the page than it needs. If it causes a problem, write to [CONTACT EMAIL].

Still stuck? Write to [CONTACT EMAIL].