What is Offline event data de-duplication and when does it occur?
When you upload offline event data, a de-duplication process detects and skips duplicates of events that you already uploaded and matched in the last seven days. This helps ensure that your offline event and attribution reporting is as accurate as possible.
De-duplication occurs when:
- You upload offline event data on a daily basis, but at different times, so there's some overlap with the previous day's upload.
- You want to upload an event file again with additional or updated customer data fields to try to increase your number of matched events.
- You have partially completed uploads across multiple attempted uploads.
If you accidentally upload the same offline event twice, deduplication will only detect the first transaction and skip the second one. If you don't want transactions deduplicated, such as if the same person makes multiple purchases at different times, make sure to include a precise timestamp, with hours, minutes and seconds. Also include a unique Order ID and item number for each transaction so that we know the events aren't duplicates.
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