Hmm ? I've not heard of nightly-routines taking place for donkeys years now ?? That's not to say it doesn't still happen but I very much doubt it, as the type of fault task we received as a result of a nightly-routine doesn't exist anymore.
It would be worded quite strongly at the head of the task,
something along the lines of .....
'This task has been raised by our automated system. The customer (as they were called back then ) is not aware a fault exists, and therefore can not be charged'For the BTOR pedants who may be looking on, it is not word perfect, but neither is my memory. However, it's pretty much on the money.
Speaking of which, I would humbly suggest this may be part of the reason this type of activity was ceased, as we were repairing all manner of faults inside the customers premises gratis. The reasoning behind it being brought in, was down to the 'Customer Experience' measure, with the thinking being if we identify and repair a fault before the customer realises something's amiss, they would be over the moon. Nice thought at the time, but financially crippling.
PS ..... these tasks were only on PSTN circuits, and I have to say I think the project was abandoned before DSL came in anyway ??