And if it was a UK form... how come it has “Kenya” etc on it? The place had had its own administration for half a century.
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Let me put it this way, perhaps the form was printed in Great Britain (initially), or designed with help from a British printer, or designed from some kind of British empire template, etc., and then the price on the sheet may have not been changed - I don’t know. One issue with this document is, how did that 7s 6d designation get there (if the form is legit.)
Except... the South Australian form was printed by the South Australian Government printer, it had nothing to do with the UK. There is no “British Empire template”. Canada, New Zealand, South Africa, Australia, Gibralter, etc etc all have their own ways of doing things. Most used pounds, shillings and pence, but the East African administration (including several former German colonies) had their own currency, as did Canada, because of the French parts.
Now maybe... someone in Kenya contracted the job of making birth certificates out, and they subcontracted to this obscure printer in South Australia, who quietly and illegally did the job using government equipment in the dead of night or in weekends, and maybe they saved money by ignoring the Kenyan requirements and just using the South Australian plates, and just changing a few words and the crest, but screwing up and not changing the price.... and no-one noticed... so they somehow smuggled these out and the Kenyans accepted delivery...
Sorry, my disbelief-suspenders just snapped.