Hi Danielle, you are correct that the file is not linked from the Tealium template. These piggyback tags reside within the tags we call - e.g. we can a tag and that tag returns a script that calls several other tags including Adroll. There are two ways to find these calls:
1)A vendor should have a UI available where you can see these types of configurations. There may even be a script section where you can see the extra JS calls. I'm not too familiar with the UI of these vendors so I can only speak theoretically but somewhere in their UI the scripts will reside. This is probably the easier method.
2) You can use Chrome's Developer Tools to view the Network log and use the Initiator column to see who is making the call. You'll have to reverse engineer the log because there could be several redirects. For example, if the page URL calls utag.js which calls utag.#.js which calls DoubleClick which calls AdRoll, you would start with DoubleClick and work backwards finding the Initiator and documenting the findings.
Neither are exactly great as it's a pretty manual process, but there isn't much more to help determine from where all the extra calls are coming.
Hopefully this helps point you in the right direction.
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