For Change in DOB in PAN, you have require these docs.-
1) Birth Certificate or High School/ Higher secondary Marksheet which contains the actual DOB.
2) A certificate from Gazzetted officer regarding you DOB.
3) File a form 49 for Changes & submit it to TIN- Facilitation Centre along with fee.
FOr change in Life Insurance Policy you have to submit Proof of your birth date which state above in point no. 1.