Whenever my wife travels for work (3-4 weeks per quarter), her hotel room's TV has the Netflix app built in. When she logs in, she is often prompted to update the 'Netflix Household'. I then have to confirm this by clicking a link (assuming I see the notification in time! otherwise she just can't log in).
I contacted Netflix support and asked them this question:
If my wife is travelling to a hotel, and she logs into the Netflix app on the hotel TV, can I still watch Netflix on my home TV?
The support agent told me the answer is 'NO' (yes, they answered in capitals). This surprised me, because a Netflix help page says "A Netflix account is meant to be shared by people who live together in one household.".This describes exactly our use of Netflix. My wife and I live together in one household. But she sometimes travels for work (obviously without me).
The support agent told me that to support this use case (one person using Netflix on a hotel TV whilst the other person is at home) I'd need to pay for an additional user.
(This wouldn't be an issue if she were watching on a phone or tablet, because portable devices apparently continue to work as long as they're used for Netflix at home at least once per month.)