Passing response ID from qualtrics to third party then back to qualtrics

Hello,
I am running a study that starts in Qualtrics, is redirected to a third party, and then returns to a different Qualtrics survey to finish. In order to match responses to the correct participant in all parts of the study, I was wanting to pass the response ID from the first qualtrics survey to the third party and then to a new qualtrics survey. The response ID is passing from the first qualtrics survey to the third party correctly, but when participants are redirected back to qualtrics, a new response ID is created. I tried to pass the response ID from the third party to qualtrics through a query string and capture the response ID from the URL as embedded data, but qualtrics is not letting me do this. Is there a way to pass the original response ID back to qualtrics or should I be trying to pass some other type of unique identifier?
Thanks.