I don't recognize that sample, but as far as Citibank you're probably looking for OCRK, or possibly Interstate.

Should be pretty, hmm, simple..

'Simple', by Norm / Lineto..
www.lineto.com / www.norm.to

Justins right, about OCRK.: CitiBank uses a custom version of 'OCRK Bold Square' by Joe Kral / Test Pilot Collective.. ( As revealed by the fabulous Typophile archives + Google.: www.typophile.com/forums/messages/83/230.html )