See you have to file before the magistrate court at local jurisdiction need order from.same based on same you will be given birth certificate.

A birth certificate can be obtained from the municipal corporation of your city. An application must be given.a birth certificate can be obtained from the hospital and on the basis of that it can be obtained.

following documents must be produced at the time of submitting the application form for the birth certificate.

• Proof of place of birth issued by the medical institution where the child was born.
• Parents address proof.
• Parents identity proof.
• Marriage certificate of the parent is optional

2)visit the Kolkata Municipal Corporation(KMC) office. Submit the birth certificate application form which can be download from the official website. Application form to be submitted along with the prescribed documents as mentioned above. On submission of the application, birth certificate will be issued at KMC office 

3) 

Delayed registration beyond one year of occurrence of birth can only be done on the basis of orders of Executive / 1st Class Magistrate of the KMC area.

Hi,

There are designated authorities for issuance of birth certificate and you are suggested to approach along with required documents.

Only a Kolkata based lawyer can tell you the complete procedure. You have to apply for registration of birth in the office of birth registrar on the basis of hospital records.

You can apply in Kolkata Municipal Corporation if hospital has provided birth details to corporation after a month you can get birth certificate for KMC.

Dear Sir,

I. IMPORTANT GENERAL INFORMATION

1) Birth or Death certificates can be obtained only if the event of birth or death is registered with the KMC.

2) Under the existing rules any event of the birth or death is to be compulsorily registered within 1 year of its occurrence.

3) Delayed registration beyond one year of occurrence of birth or death can only be done on the basis of orders of Executive / 1st Class Magistrate of the KMC area.

4) Births or deaths occurring in places within the area under KMC jurisdiction can only be registered by the KMC.

5) The entire KMC area is divided into 15 boroughs for administration and the office of the Executive Health Officer of each borough is the Registration Unit for all births occurring within the respective Borough area.

  II. PROCEDURE TO OBTAIN BIRTH CERTIFICATES

A. For Birth events occurring in Private Hospitals / Nurshing Homes in Kolkata

1) Birth certificates can be obtained from the concerned office of the Borough Ex. Health Officer usually after 6 weeks from the date of birth, subject to the condition that all birth events are reported in prescribed registration format by the private hospitals / nurshing homes within 21 days from the date of occurrence to concerned borough Ex. Health Officer as a mandatory requirement.
2) Name of child can be inserted at the time of taking birth certificates by the parents or a relative authorised by the parents in writing.

B. For birth occurring in Govt. Hospitals in Kolkata

1) Birth certificates can be obtained from the concerned Borough Health Office upto a period of 1 (one) year from the date of birth on production of medical certificate of birth issued by the hospital.
2) Name of child can be inserted at the time of taking birth certificate by the parents or a relative authorised by the parents in writing.

C. For Domiciliary birth events:

1) Domiciliary events of birth shall be reported by the Head of family to the concerned Ward Health Unit for registration within a month but not later than 1 year along with production of medical certificate of birth issued by a Medical Practitionar / Midwife / Traditional Birth Attendant. Birth certificate can be obtained on the spot from the Ward Health Unit.
2) Birth certificates in respect of domiciliary events not reported within one year can be obtained on delayed registration on the basis of orders of First Class Magistrate of KMC area from the concerned borough Ex. Health Officer [up to 20 years] and KMC Main Office [beyond 20 years].

 IV. NON AVAILABILITY CERTIFICATE:

If an event of birth is found not registered, a Non-availability certificate can be obtained from KMC Main Office, Health Department at 5, S.N. Banerjee Road, Kolkata - 700 013 on production of supporting documents like Voter ID card, Educational Record, Ration Card etc

Apply for a birth certificate at your municipal office. If they have the records of your birth they'll issue you the birth certificate. In your case since it wasn't registered they'll issue a "Record Non Availbility" certificate. You have to take this certificate and contact a lawyer. They'll ask you to bring your school passing certifiable, voter ID card etc to prove that your dob is as stated by you. A lawyer files an application in the court and after verification a court order will be issued to issue you a birth certificate.

PROCEDURE OF DELAYED BIRTH REGISTRATION

STEP 1-

Apply for non-availability certificate of birth

where to contact - office of birth and death registrar

Documents needed - DOB proof

STEP 2-

Apply for delayed birth registration order (from DM/SDM or any other first-class magistrate)

Where to contact- office of DM/SDM or court

Documents needed- 1-BIRTH REPORT, 2-NON AVAILABILITY CERTIFICATE, 3-AFFIDAVIT/SELF DECLARATION OF PARENTS, 4-AFFIDAVIT OF WITNESSES, 5-DOB PROOF, 6-ID/ADDRESS PROOF

STEP 3-

Apply for birth registration

Where to contact - office of birth and death registrar

documents needed - 1-DELAYED BIRTH REGISTRATION ORDER, 2-DOB PROOF, 3- ID/ADDRESS PROOF, 4-BIRTH REPORT

STEP 4-

After successful registration collect the birth certificate from the office of birth and death registrar or download from Civil Registration System

[non-availability certificate→ delayed birth registration order → birth registration →birth certificate]

For fee and other information see RBD RULES

You need to apply the same with the sub registrar of birth and death. 

Refer to all the details listed on the website of Kolkata Municipal Corporation. The relevant link is given below:

https://www.kmcgov.in/KMCPortal/jsp/KMCBirthDeathHome.jsp

Have to apply at first class magistrate court, Collector office.  Hire local lawyer.

- Registration after one year of child's birth can only be done by the dictum of a First Class Magistrate.

- Birth Certificate can be obtained from the Department of the Chief Municipal Health Officer by submitting the original directive of a First Class Magistrate and other documents of proof.

- The following documents are required to be submitted with the application :

1.Proof of place of birth issued by the hospital/clinic where the child was born.(if available)

2. Parents address proof , from the year of birth of child .

3. Parents identity proof , like PAN card, voter card etc

4. Marriage Certificate/record , if avialble 

These docments should be from the area where the child was born

- Now, in calcutta , there is facility to apply through online mode as well,

please post your query in details. 

Registering Birth in West Bengal   

All persons are required to register their birth under the Registration of Birth Act of West Bengal.

• 
  For births in a Government Hospital: The birth certificate can be obtained from the Health Officer office within 21 days from the date of birth.
• 
  For births in a Private Hospital: – The birth certificate can be obtained from the respective borough up to one year.
• 
  For birth in a House: The birth certificate can be obtained from borough but events of birth should be reported by the Head of Family to the concerned Ward Health Unit for registration.

Required Documents

The following documents must be produced at the time of submitting the application form for the birth certificate.

• Proof of place of birth issued by the medical institution where the child was born.
• Parents address proof.
• Parents identity proof.
• Marriage certificate of the parent is optional.

For late registration you will have to pay late fees to sub registrar birth and death.