It is not relevant for the majority of forum members but for what it is worth, I have debit and credit cards from banks in different EU countries and I have never ever heard that one has to inform one‘s bank that one travels abroad and will spend money there. Of course, because we live on a small continent with dozens of countries, spending money abroad is something that happens a lot more often than when you live on a larger continent with larger or more isolated countries …
It is a very long time ago but I remember those days when you could only draw cash abroad from an ATM by using your credit card and not by using a debit card - question of payment networks. A comment on point of sales and not ATM - even in recent years, I’ve encountered situations in EU countries where I could not pay by credit card (and it had nothing to do with the owner wanting to avoid commission fees) but only by debit card
and vice versa. My hairdresser, strangely enough, has one of these standard small devices, just like anybody else, but it takes only credit cards. which is quite unusual around here.
Major payment networks of Spanish banks are Servired, Euronet 6000 and Telebanco 4B. Customers don’t need to know about it but it is entirely possible that there is an issue of incompatibility in some rare occasions and combinations of ATM and card issuer.