[inigyou]

Your bank is calling you from a verified network, unverified number, because it's one of their employee's phones but they want the caller ID to be from the main switchboard, and they didn't bother to do the extra work with their telecom to make this verify as a correct number.

[briffle]

and when they can't get lots of "we don't accept unverified calls" messages, they will fix the problem.