We need to store bank account numbers and will set up a CiviCRM custom field for the data. Ideally we would like the field to be such that people only enter data in the following format xx-xxxx-xxxxxxx-xxx. Is it possible to customise the custom field format? if so how would I do it?
Or do I need to create a work around eg have 4 integer fields that display inline with dashes inbetween.