NRR Sheriff Division

I received an SMS from Nedbank stating that I need to contact their NRR Sheriff Division before they start removing movable assets. Naturally, I began to panic because as far as I know, all of my accounts are up to date and nothing is in arrears. I phoned them to find out what exactly happened, only to be told that they have "made an error" and that they are "sorry for any inconvenience". How the hell do you accidentally send threatening messages to loyal clients that have not given you any reason to do so? Surely this is not the first time this has happened, and probably isn't the last.