@Ceri289
We are customers here who help each other.
Sky usually sends packaging out near the end of the cancellation notice period of 31 days for TV or 14 days for Broadband/Talk so if you haven't received it then you can use whatever boxes you have or can get as this link will help you to print the return label and return it via Royal Mail:
https://www.sky.com/help/articles/return-tv-broadband
Add a note inside with your account number and a list of equipment you have included.
Make sure you get and keep proof of posting when sending this off.
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If someone has helped you then please click on the LIKES button in their post.
If you need help please provide as much information as you can
