It's nice that you had a ceremony. They only sent me a letter when I received Kiwi citizenship, probably because I was already a Subject of Her Majesty anyway.
Foolestroupe, it is my contention that everyone is a foreign immigrant everywhere, except maybe the Oldavi Gorge, and no-one lives THERE now. To slow down chauvanist Maoris I sometimes claim to be an original Maori myself, my ancestors arriving on the canoe Deeceethree, and my tribal affiliation Ngati Mafia. It raises a laugh and makes them thoughtful, which is the object of the proceedure.