OCI Application - Other necessary documents of Indian origin

[kannit]

Hi,

On VFS website (http://www.vfsglobal.com/india/uk/OCI.html), following document list is mentioned.

Other necessary documents of Indian origin.

Domicile certificate (in original)

OR
Original Birth Certificate issued from Indian Municipality or Panchayat. Recently issued birth Certificate (Post-dated birth certificates) from Municipality/Panchayat etc. This should be duly certified by the District Magistrate/District Collector of the area, with name, stamp, seal and contact telephone numbers with area code for verification.

OR
School Leaving Certificate (in original). Post-dated School Certificate/School Leaving Certificate from India should be authenticated by Director of Education/District Magistrate/District Collector of the area with name, stamp, seal and contact telephone numbers with area code for verification

OR
Agriculture land documents.

We are family of 4 applying for OCI:
Me and my wife: Born in India, now British passport holder and surrendered Indian passports
Kids: Born in UK, had Indian passport which have been surrendered, now British passport holder

Do we require to provide one of the documents mentioned above? If so, getting them certified/authenticated will be a problem.

Best regards,
Nitin