Here is a list of Marketo's native de-dupe behavior by activity.
| Activity | De-Dupe Behavior | Comments |
|---|
List import | Marketo will match with the record which was most recently updated | |
Not cookied and fills out form | Marketo will match with the record which was most recently updated | Record will become cookied. Pre-fill and progressive profiling will work on the next form. |
Cookied and fills out form | Marketo will match with the cookied record | Pre-fill and progressive profiling will work |
Not cookied, sent email and fills out form | Marketo will match with the record which was most recently updated | Record will become cookied. Pre-fill and progressive profiling will work on the next form. Email and filled out form activity will be on the record sent the email. |
Cookied, sent email and fills out form | Marketo will match with the cookied record | Pre-fill and progressive profiling will work. Email activity will be on the record sent the email. The filled out form activity will be on the cookied record. |
Send email flow step in a Batch Campaign | The email will be sent to the record with the lowest Marketo ID, that is, the one that was created first in Marketo | |
Send email flow step in a Trigger Campaign | Emails will be sent to every record since Marketo handles each record separately | |
Additional resources.
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