Dear client,
As per the information provided by you, it appears that your legal name after marriage is Anamika Mishra and all your documents like passport, Aadhaar card, and PAN card have your current name. However, your birth certificate needs to mention your original name at the time of birth.
In such cases where the birth registration is being done after a long period, the authorities generally issue the birth certificate in the current name of the applicant. In your case, as all your documents have the name Anamika Mishra, the birth certificate is likely to be issued with the same name.
However, to avoid any confusion or discrepancies in the future, you can also request the authorities to include your original name at the time of birth, i.e., Anamika Tiwari, in the birth certificate along with your current name. This will ensure that both names are mentioned in the certificate, and there is no issue with the name mismatch.
It is advisable to consult the concerned authorities in your municipality for further guidance and clarification on the process of birth certificate registration and issuance.