Re: Lira?
They actually done this with the Romanian currency years ago (LEU/RON).
They took off the 4 trailing zeros, so 50,000 became 5.
When I was over there, both sets of notes were still in use, actually, was fairly straightforward to use, don't know about behind the scenes though I think the currency name changed as well to make it easier to deal with, think RON became LEU
Think I still have a 50,000 note around here somewhere.