Fingerprints DO change, usually as a result of wear and tear. As far as I know, the patterns you are born with will not change on their own, but injury and damage can and do alter them, sometimes considerably. Nicks and cuts that heal unevenly will alter the fingerprint, sometimes dramatically. And people that work with bricks and cement are usually the worst for a fingerprint taker; the constant wear of the rough surfaces will actually remove the print completely, given enough time.
Requiring a new set of fingerprint cards for each renewal really isn't all that unreasonable given the circumstances.


