How to make sure all deleted texts are deleted from icloud

Greetings Jmalatek, 

We understand you have questions about deleting data from iCloud. 

When you delete Messages that are syncing with iCloud from the Messages app you should notice that they are deleted from any other devices that are syncing with iCloud using the same Apple ID. 

Another thing you do is turn Messages for iCloud back on and see if messages sync to your device. They should not, if they were deleted. 

Messages are not a category of data that are visible on the iCloud website.

Thanks.