A 30-year-old professional is seeking advice on changing their surname from Kashyap to Mallah on their leaving certificate. Their birth certificate shows Mallah (father's surname), but school records and all subsequent documents, including degrees, PAN, Aadhaar, and passport, list Kashyap due to an admission error. The municipal office refused to issue a birth certificate with the Mallah surname due to the applicant's age. The individual is concerned about the process and potential repercussions of changing their surname at this stage, especially since all official documents are under Kashyap.