Parcelforce labels you create through Shiptheory will not appear in Parcelforce's WDM, everything goes through Shiptheory electronically. If you need to 'delete' a Parcelforce label you can just discard the label as you won't be charged for the label if it's not scanned by Parcelforce.

If you have any queries or issues with this, please get in contact with support and we'll be happy to help!