Hi John. Thanks for your question about https://www.hellosign.com/eventbrite
I don’t know of any other of our customers using this, but my best guess is that it would work because Eventbrite handles the ticket checkout process.
Our Eventbrite Tickets add-on for The Events Calendar basically just displays the Eventbrite tickets via their API.
Since it sounds like HelloSign gets sent the notification when a ticket is purchased via Eventbrite, I’d guess it’ll still work for you.
We have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
Let me know if you have any follow-up questions.