I'm from the US and haven't had great luck in Europe. One card ditched "travel alerts" in 2016, the other I swore added one when it saw I purchased plane ticket

I'm from the US and haven't had great luck in Europe. One card ditched "travel alerts" in 2016, the other I swore added one when it saw I purchased plane tickets, but it didn't. Both got flagged causing problems. One card I specifically got because it had no foreign transaction fees and was recommended for traveling. Only one of my cards is contactless and I about every 4th or 5th transaction I get flagged and they need to enter info from my ID to complete the transaction. For a lot of services that require preauthorization just don't work and don't give clear error messages. Even if my card worked the first time I wouldn't trust it would work the 3rd or 4th. Until I bought a monthly pass every trip took time and some luck. I wish I knew prepaid cards were an option.