Student loans?
Court Orders *spit* - although with a bit of luck you can avoid the need to do these programatically!
Car mileage Even/Odd years if your implementation deals with mileage claims.
Peter makes a good point about pensions balances - also pensionable pay, particularly where capping is a possibility. Indeed, anything which is likely to be extracted and sent to a third party.
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L&K
CT
Remember: A dog is for life, not just for Christmas... unless you're in Korea