Howdy Nick,
Welcome to our support forums and thanks for reaching out to us. I’ll try to help figuring out your questions.
a) Automatic ally identify (or filter) customers who have purchased tickets for a specific event
You can access the Attendees and Order reports to check on this – https://cloudup.com/cIidQwzhrkV.
b) transfer all the tickets to another event? and/or
I don’t think this is possible right now. Maybe you give those users a coupon for a free ticket so they can book another event?
c) refund the tickets in one go either via Stripe/Sage
Refunds are issue by the E-Commerce platform you are using to generate the tickets. So the process might be different in the different platforms. If you are using WooCommerce, you can check out this article: WooCommerce Refunds, I’m aware it’s possible to issue ‘partial refunds’ in Woo.
Basically you’ll need to check this in the docs of the e-commerce platform you use.
d) export all the emails of the customers so they can be bulk mailed using mailchimp so they can be informed of any changes etc
You can do so with the ‘Export’ button in the Attendees report page. See my answer to question ‘a’.
Please let me know if there’s anything else I can help you with,
Have a great weekend,
Nico