I would't do this if the bank is one that I care about maintaining a good relationship with going forward. Chase? Amex? It's not worth it to me to possibly burn my bridges with them, IMHO. Yes, I know people do it and they live to tell about it. That's OK. I figure I do enough edgy things already with these banks, I want to stay on the happy side of their line, so I'll forego a handful of points that I might be able to grab and run. We're not talking about a huge number (at least not for me) so I'd rather not risk getting on their list of customers they can do without.