@Walter Hinteler,
So the nephew, living 90 minutes drive away and having been terminally ill with prostate cancer, died today.
Hid daughter, grand-niece, who actually tried to look after her grand-aunts, starts her new job as teacher (training) on Monday ... she has no car, it takes nearly three hours to get here from where she lives now (before, it 'only' was one hour).
All powers to conduct businesses are with her ... and her now dead father.
We were just informed that the family doesn't want to be disturbed in their grief - by a sister of the dead, who lives in Berlin (4 hours by car), but is now the 'contact person'.
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The older one of the two ladies will stay in the senior residence permanently - there's some paperwork to do to, because until next week her stay there is paid completely by the nursing care fund, later she'll have to pay it partly herself. (She really likes it here!)
Her younger sister, in the psychiatric hospital, still isn't doing very well - but I don't think that they'll keep her there for longer than mightbe a fortnight.
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At least, I know how to arrange some things .... which legally certainly are in akind of grey area ...