Non Conviction certificate and Non change of nationality certificate

Served in the Indian army, but i was unable to withdraw my pension due to some personal and banking kyc issues, but now my account is fully compliant with kyc, now the bank is demanding 4 types of certificates to restore my pension payment. Non Conviction Certificate Non Change of nationality Certificate Non Re-employment Certificate Life certificate of present year I have the formats for Non re-employment and Life certificate but I don't have the formats for Non-Conviction certificate and Non-change of Nationality certificate nor does the bank have the formats for these certificates. 1)Searched online and PCDA, CPAO websites regarding these certificate formats but nothing available regarding these certificates. 2)Visited the local police station for a Non-conviction certificate but they said they do not have any such kind of certificate and advised me to bring Formats or issues to other people so that they can issue the same certificate to me as well. 3)Also Consulted Lawyer, and he advised us to declare the non conviction and non change of nationality on non judicial stamp paper and get it sealed and signed from the public notary. Kindly guide us regarding this matter and please inform which dept issues these type of certificates...