Revoked means it can't be used for travel. It doesn't mean it never existed and therefore your citizenship never existed. Lesson #1 - pay your taxes.
Maybe I will get them a COC at some point, but it's $2300 that can be better spent elsewhere, like their plane tickets, setting them up for school.
I keep all of the immigration documents that I've done for them, the wife and both kids, in soft and hard copies.
IMHO is shouldn't even be required. If my wife goes over to the Philippines to prepare them, Medical and Interview while she is already a US citizen and they are her minor children, then that should be sufficient. Or how about adding it onto the ton of money I've already spent for them to do her paperwork, yet they can't add another document to the pile of papers they already create?
I don't mind playing by the rules, and this is not my first time around the immigration merry-go-round, but i do get tired of being fleeced, and not for nickels and dimes, at every damn turn. Oh and did i mention with crappy service for the most part.