That Finance::* namespace is a wierd one. It has general things like interfaces to various accounting programs data formats as well as protocol sorts of things. Lingua::* has a similar complexity.

To make things really work there, someone needs to take charge and unify everyone, sort of like DBI did for databases and LWP did for many of the net interfaces. What you really care about is the transaction, not the institution, really. If I wanted to interact with four banks (and I do), I want to use the same script.

That stuff aside, I think in your case you can't escape having the bank name in the module name, because that's how people think about it. If Citibank disappears, for instance, Finance::...::Citibank probably won't be useful anymore anyway, whereas in my example Netscape lived on in other things.

As a PAUSE admin, in these cases I just follow the precedent.