https://community.hubspot.com/t5/APIs-Integrations/For-Hubspot-API-is-there-a-quot-transaction-quot-concept/m-p/248630#M21423 <P>Hi <A class="mention" href="https://community.hubspot.com/u/kun_lu">@Kun_Lu</A>, There's no built in property, per-se, that you could track that could enable you to do this. That said, you could use the response code that our server sends back as a condition in order to know if you should proceed, or delete your original contact. I'd say this is really your only feasible solution in this case.</P> Thu, 20 Dec 2018 19:01:15 GMT cbarley 2018-12-20T19:01:15Z