[throwaway2048]

There is no obligation for any state to issue citizenship to anyone, unfortunately.

[martinflack]

There are UN conventions[1][2] on statelessness that do require the bound parties to provide citizenship under very narrow conditions, essentially to avoid a stateless person. IANAL so I don't know if they apply in this type of example.

[1] https://en.wikipedia.org/wiki/Convention_Relating_to_the_Sta... [2] https://en.wikipedia.org/wiki/Convention_on_the_Reduction_of...

[throwaway2048]

Not only have most states not signed this, there is no meaningful penalty for ignoring it.

[s_dev]

https://en.wikipedia.org/wiki/Convention_Relating_to_the_Sta...