Father was pupped 1913 when Grandad, a soldier, was stationed at Weihaiwei on the North China Coast. A couple of years later in 1915 Granddad had reason to be in Tientsin (Tianjin as it must now be known) popped into the British Consulate and give or take a few inexactitudes on precise dates and places that vexed Granny no end got Dad a birth certificate that covered the essentials
Happily this proved to be no obstacle when Dad joined the RAF in 1938 or indeed I (pupped at Halton in '54) when I proposed to take a Queens Shilling of a more salty complexion in '68.
Perhaps all three of us were lucky not to run into the demon Jobsworth.