My bank (Bank of America) offers this feature, but it's a bit buried in the menus. Custom limits and everything, it's pretty useful.

But there are plenty of reasons not to do business with Bank of America. I'm no shill for them.

Thanks, I'm with BoA and didn't know about the feature (it's called ShopSafe, for others).

I like privacy.com for this purpose - works well plus it can anonymize transactions to make them opaque to the bank.

I love privacy.com - I can kill the debit cards I generate and use with specific merchants when they have been exploited.

Cool to know the feature exists somewhere. With the tidal wave of cryptocurrencies I'm optimistic that traditional banks will be forced to improve their customer relations, access, and transparency.