Most waste disposal firms are legal and licensed by Natural Resources Wales!
Just having a Waste Carriers Licence doesn't mean they're disposing of your rubbish legally.
You need a waste transfer note from them when your rubbish is collected.
All waste that you pay to get rid of should be taken to a commercial waste transfer station for disposal, and were possible recycled!
Paperwork should be provided at all times and contain disposal details as follows:
Carriers Name and Address
Disposal site licence number
If you are not given these details you are not dealing with a legitimate waste removal firm!
If your offered cheap waste disposal without the proper paperwork then they are not doing it legally.
(even if they take it to a council skip site)