I’m having a problem, or maybe it’s a feature that I’m not sure how to config, where the Upsert contacts endpoint it’s creating different contacts when usign the same email. I’m not sure why this is happening. Maybe someone already had this problem, and can help me figure out a solution
Hey, @FRiccardi 
Can you share a really simple example request and response? This helps our community members have more info to work with when trying to troubleshoot along with you.
Thanks! — Jaycee