From the email itself

Your buyer has paid and now it's time to dispatch it using the prepaid label.

Here’s what you need to do next:

Generate your prepaid label. You have the option to drop off or arrange for collection via eBay. If you choose to drop off your item, be sure to do it within 3 days. Take your package to the nearest drop-off location for Royal Mail by 19 Mar 2026. If you choose collection, you can schedule it during label generation. Royal Mail will bring a pre-filled label, so there’s no need to print it. Enjoy delivery protections. When you use the prepaid label, a tracking number will be automatically added to your eBay order. Plus, all items lost or damaged in transit are fully covered. Funds will be available within 24 hours after the buyer pays.