Vendors: How do I FIND the TC String?

How do I FIND the TC String?

If an impression is received server side (through openRTB for example), you should read the information from the TC data payload. For openRTB, technical specifications were updated to provide information on where and how the information is passed. For other non-standard server side delivery, clarify with the partner on how the TC data payload is passed.

When the impression is received client side (redirect, prebid, etc.), leverage the CMP to request and read the TC data. This information can be collected whether you are in the top parent page (using the __tcfapi method) or from an iframe (using postMessage method as defined by the CMP API technical specifications).