If your school and college certificates mention 'Maratha' caste, but your official caste certificate states 'Kunbi', you might face issues when applying for a caste validity certificate. While schools cannot change their records, you can address this discrepancy. It's recommended to obtain an affidavit explaining the difference and potentially consult the SDM or Tehsildar's office to rectify any inconsistencies, especially if your father's records clearly show 'Kunbi' caste.