0 someone who signs a document to say that the information they have given in it is true --
Furthermore, the statement must relate to the circumstances or the cause of the declarant's own death.
The statement must be spontaneously made by the person (the declarant) while still under the stress of excitement from the event or condition.
Some (but not all) exceptions to the hearsay rule apply only when the declarant is unavailable for testimony at the trial or hearing.
The declarant is the person that makes the out-of-court statement aka not the person bringing the action (lawsuit).
As with all testimony, the dying declaration will be inadmissible unless it is based on the declarant's actual knowledge.
Nor could diplomatic staff serving overseas be expected to treat lightly an exercise which required posts to validate or attest a declarant's citizenship and right of abode.
Now let us return to the declarant.
We are the declarants of our policy.