Hello Shaun,

For proof of nativity, here are some solutions to what you can do :

NATIVITY : Only Indian citizens are eligible for admission to Professional courses unless otherwise notified. Persons of Indian Origin (PIO)/ Overseas Citizen of India (OCI) will also be treated at par with Indian citizens for the limited purpose of admission. However PIO/OCI candidates will not be eligible for any kind of reservation. Candidates seeking admission to Professional Degree courses will be categorised as Keralite, Non-Keralite Category I (NK I) and Non-Keralite Category II (NK II).

• Keralite : A candidate of Kerala origin will be categorised as a ‘Keralite’. Only ‘Keralite’ candidates are eligible for Communal/Special/Persons with Disabilities reservation or any fee concession. Children of All India Service (AIS) officers (Non-Keralites) allotted to Kerala cadre are deemed to be ‘Keralites’. But they will not be eligible for Communal/Special/ Persons with Disabilities reservation or any fee concession. In order to prove that a candidate is an Indian Citizen of Kerala origin, he/she has to upload a certificate showing that the candidate or his/her father or mother was born in Kerala.
• Non-Keralite : Category I (NK I) : A candidate who is not of Kerala origin but fulfils anyone of the following conditions will be categorised as 'Non-Keralite Category I'(NK I). (a) A candidate who has undergone qualifying course in Kerala and who is son/daughter of Non-Keralite parents belong to Government of India/Defence Service, posted to Kerala. (b) A candidate who has undergone qualifying course in Kerala and who is son/daughter of Non-Keralite parents who are serving/served Government of Kerala for a minimum period of two years. (c) A candidate who is not of Kerala Origin but has been a resident of Kerala State for a period of 5(five) years within the period of 12(twelve) years of his/her study. (d) A candidate who is not of Kerala Origin but who has undergone his/her school studies in Kerala from standard VIII to XII.\
• In order to prove that the candidate is a Non-Keralite Category I (NK I), he/she has to upload the relevant proof of the online application. Non-Keralite Category I candidates will be considered against ‘State Merit’ seats for Engineering/ Architecture/B.Pharm./Medical & Allied courses. But they will not be eligible for 3 Communal/ Special/Persons with Disabilities reservation or any fee concession.

• (C) Non-Keralite Category II [NK II] : Candidates who do not come under ‘Keralite’ or 'NonKeralite Category I' will be categorised as ‘Non-Keralite Category II'. Such candidates are eligible for admission to Government seats and Management quota seats in Engineering courses in Government Controlled Self financing Colleges. However, the ‘Non-Keralite Category II’ (NK II) candidates will be considered for admission to the Government seats in Government Controlled Self Financing Engineering Colleges only when the Keralite and Non-Keralite I (NK I) candidates are not available for admission. ‘Non-Keralite Category II’ (NK II) candidates are also eligible for admission to Government Seats and Management Quota seats in Private Self Financing Engineering/Architecture Colleges. ‘Non-Keralite Category II’ (NK II) candidates are also eligible for admission to a maximum of 10% seats under Management Quota in Private Self Financing Pharmacy colleges. Non-Keralite Category II’ (NK II) candidates will not be eligible for Communal/ Special/ Persons with Disabilities reservation or any fee concession. ‘Non-Keralite Category II’ (NK II) candidates are not eligible for admission to Medical and Allied Courses including MBBS/BDS and for admission to Government Engineering Colleges.

"ATTACHING THE LINK TO THE OFFICIAL FORM BELOW"

http://www.cee-kerala.org/docs/keam2012/exam/memo/keam2012keralites.pdf

HOPE THIS HELPS !

ALL THE BEST !