Pan card application

I need to get a PAN card for my wife and hence contacted an agent.

I got her name changed in Bank Account, Voter ID card and Aadhaar card.

Agent says as she has old name in her Birth Certificate (only sername is different) hence she need to go in front of SDM and get an affidavit signed for it.

Is it correct. I have doubt as every lady has same situations if she need to get a PAN card created after her marriage.

Pl suggest. everyone who came across such situation.