I asked this question and got this reply :-
Dear Mr Lucas
Thank you for your email.
If you already have the UK-issued CNI, you may authorise your fiancée to submit the application. We need to see all the original documents except for your passport. We may accept the certified true copy of your passport.
Please read the Certificate of No Impediment (CNI) guidance on the website
http://ukinthephilippines.fco.gov.uk...ply-for-a-cni/ to ensure that you and your fiancée will have all the requirements.
When you are ready to submit the application, please send your 5 preferred dates to arrange your appointment. Please note that the next available appointment is on 11 July onwards.
Sincerely yours
Consular section
British Embassy Manila l 120 Upper McKinley Road, McKinley Hill, Taguig City 1634
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From: Barrie Lucas
Sent: 28 June 2012 11:43
To: CONS Manila (Protect)
Subject: CNI Exchange question
Hello,
Can you advise if I need to attend personally to exchange a uk CNI into a Philippines CNI?
I could send it to my fiancée and she could exchange for me before I actually arrived in the Philippines.
Regards
Barrie Lucas