Reusing an Old Attendee List for Your Next Event: Check It First

To reuse an old attendee list, merge the events into one CSV, remove duplicates, verify every address and invite valid rows first. Past attendees are your warmest audience, but a list from a year ago has aged. The email verification for webinars and events page covers the check; the email list decay calculator shows how much to expect.

Step 1: merge events

Combine each event's export. The Eventbrite export guide shows where to find attendee CSVs, and the compare email lists tool shows who attended more than once. Remove repeats with the duplicate email remover.

Step 2: verify

Upload the merged CSV on the verify page. Expect Mailbox not found on work addresses from people who changed jobs. Typo domains from the original registration will show up too.

Step 3: segment by recency

Group by when each person last attended. Last year's attendees get a direct invite; older ones get a gentler "we have a new event" note. The re-engagement guide covers wording and timing, and the trade show follow-up guide shows the same cleaning for exhibitors.

Step 4: handle the risky rows

Accepts all addresses and Role address rows are risky, not invalid. Send to them in a small batch after the valid rows.

Step 5: record what you learned

Keep the result next to each contact. Next year you start from a cleaner list and re-check only the new additions.

What this cannot do

• It cannot tell you who will attend again.
• A valid result is a snapshot of the mailbox, not of the person's interest.
• Yahoo and AOL accept mail for any address during the check, and Microsoft consumer mailboxes are not probed, so they come back risky.

Check your attendee list

Upload it on the verify page: the first 100 checks are free with a Google sign-in, no card. For big lists, see bulk email verification and pricing.