Dear Sir/Madam,
The existing PAN should not be surrendered or replaced merely because the 5th character does not match the corrected surname. PAN is permanent; changes in name/father’s name should be made through a PAN correction request.
If the PAN database now contains the correct name, the 5th-character issue should not by itself require a fresh PAN. Applying for another PAN when one already exists is not advisable and may attract penalty under Section 272B.
Also, if your son has Aadhaar and is not in an exempt category, link Aadhaar with the existing PAN; minors are not generally exempt merely because of age.
If SBI or the Income-tax portal gives a validation error, the PAN records should first be checked and corrected through the appropriate PAN/Income-tax authority.
Please book a phone consultation with the PAN card, Aadhaar and correction acknowledgement for specific guidance.
CA SHUBHAM GOYAL