(I think alot of ISPs in US try to make it difficult to stop services?)
Required by the FCC. We can't make a change to a customer's account without jumping through a number of hoops to verify the customer's identity and that the person requesting a change is authorized by the account owner. In the event of the death of a customer, we need either a copy of the customer's death certificate or a copy of the court documents giving control over the estate. So far as I know, and this has never come up at the company I work for, the FCC regulations don't include an exception when the company is responsible for the customer's death. Even personal knowledge of the customer's death isn't sufficient to transfer control over the account to another person who isn't already authorized on the account. Powers of Attorney aren't sufficient, either, as they terminate at the covered person's death.
So yeah, FCC regulations make it hard to terminate services. It's a result of the uproar a few years back from LD companies cramming new services onto local accounts, or fraudulently pretexting to misidentify a broker as the account holder.
If all else fails, immortality can always be assured by spectacular error. -- John Kenneth Galbraith