I want to import an old database using API Contact create. In the de-dupe rule documentation it mentions "They are also used when you Import contacts". I see in the API documentation that there exists a parameter 'dupe_check'. When set what will it do exactly? Will it use the rules? How will it respond when dupes are found?

1 Answer 1


The dupe_check works almost exactly the opposite from what you'd expect :)

If you set dupe_check to TRUE in a Contact.create API call, then an unsupervised dedupe check will be performed. If there IS a duplicate, then the contact won't be updated, the API call will return an error with a list of contact IDs that are matched.

  • Wow a 6 year old question now answered!
    – Demerit
    Commented May 18, 2022 at 20:55

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.