Selling citizenship to a country which isn’t recognized by leagues or unions, intent thrust into existence, scant generations hence.
Your initiation packets include:
A passport, acknowledged only by arbitrary atolls, expired drilling platforms, and occasional metaphysical realms – with names borrowed from Dead Sea Scrolls
Postage stamps, assorted, bearing fetching motifs in three colour plates
A seal, stamp-able with ink and spring or possibly emboss-able
Currency, printed on vellum, with dew-coloured coastlines which might exist, if randomness permits.
The rest, yours to determine, simply add origin myth, considering prior manifestations
Govern yourself accordingly.