I have an AmEx card with Scotiabank in the Dominican Republic. It has both pesos and US$. I only use it to buy on Amazon. It is rare that I use it for anything else online. In person I use it constantly in the DR because it gives me great rebates. Yesterday Scotiabank called me to ask if I had booked an airline ticket for $510US. During a pandemic? I'm 70 years old! The easy answer was, 'No'. There was also an authorization request that showed up on my e-mail at the same time that the CSR called. Immediately the transactions were cancelled and the card number was also cancelled. An inconvenience, but to save over $500, I'll take it. Thank you, Sociabank for your good service!