If a tracking number you expected to swap on your website is not swapping, it may be a good idea to check your swap script placement.
It’s important that our swap script is as close as possible to `</body>` tag in your site's code. This helps ensure that our swap code is one of the final things on the page to load. If you have placed it too far above the `</body>` tag, other pieces of code from other sources could be conflicting with our swap functionality.
While uncommon, if you suspect that another website's JavaScript could be interfering with CallRail, we recommend removing or rearranging your other JavaScripts to see if this solves your problem.
