If you are returning from Switzerland, please follow the instructions for European returns but there are a few things that need to be taken in to account.
Always make a registration and fill out the CN22 (low value) or CN23 form.
Make sure that you are declaring the goods as "returns".
The following documents are required:
Shipping label
The invoice of origin
EORI number of the recipient (Motel): GB982041525
You can read more information from Swiss Post here: https://www.post.ch/en/customer-center/online-services/vgk/begleitpapiere-kleinwaren-international/info