The banks still advise customers to inform them when travelling, but I've not found that to be necessary when in countries with chip and PIN. (If I'm going outside Europe I will inform the bank of my main card, but in South America, Asia, Africa there will be some point where it isn't accepted, and I use a backup card -- that bank doesn't know I'm travelling.)
The USA used to be the problem -- about once a year, someone in the office would get a robot phone call from the bank saying their card had just been blocked due to suspect activity in the USA. That should be becoming a lot less common.
The banks still advise customers to inform them when travelling, but I've not found that to be necessary when in countries with chip and PIN. (If I'm going outside Europe I will inform the bank of my main card, but in South America, Asia, Africa there will be some point where it isn't accepted, and I use a backup card -- that bank doesn't know I'm travelling.)
The USA used to be the problem -- about once a year, someone in the office would get a robot phone call from the bank saying their card had just been blocked due to suspect activity in the USA. That should be becoming a lot less common.