Either, and you choose each time. On Solo and Pro, RentGuide can email a notice for you. It goes from notices@rentguide.co.nz under your name, replies come straight to your own email, and RentGuide records it as served by email at the moment it was sent, applying the 5pm rule for you. Email only counts as serving a notice on a tenant who has agreed to it in writing, so RentGuide only emails tenants you've marked that way, and lists anyone else so you can serve them in person, in the letterbox or by post. For those, you record how and when you delivered it, and RentGuide works out when it counts as received. RentGuide can confirm an email was accepted for delivery, not that your tenant opened it. On the free plan, you copy the notice and send it yourself.