Sign out locally when the device is available
On a smart television or mobile app, open the TVNZ+ navigation menu, Settings and Sign out. On a computer or mobile browser, use the profile icon or name and Sign out. This ends the session on the device being used. It is the direct route when returning a borrowed screen and does not require removing the whole account or its viewing record.
Use the documented remote removal
For a device elsewhere, TVNZ’s general help gives a browser route: sign in, open the profile, Account and Devices, then choose Remove beside the intended device. Confirm with the one-time code sent by email. The help says the remote device signs out the next time its TVNZ+ app opens, so the documented effect should not be described as an immediate wipe of that device.
Apply the current workaround to a failed removal
At the November research check, TVNZ’s Current known issues article acknowledged that website device removal fails for some accounts. Its workaround uses an already available smartphone or tablet app: More, Settings, Manage Devices, then Sign Out beside an unused device. TVNZ describes this as something that may work while the issue is investigated, rather than a universal replacement for the general browser instructions.
Return to the device you wanted to use
After the workaround, TVNZ directs returning to the originally blocked device and signing in again. Remove only the intended old sessions and check that result before repeating the operation. The issue article does not establish a new numerical device allowance. This workflow addresses a failed device-management action, rather than promising that a different plan or account deletion is needed.