You can execute affidavit that "Udal Singh" and "Udal Singh Kashyap" refer to one and the exact same individual.

Mention his official death certificate, his Pension Payment Order (PPO) if applicable, and your own identity documents showing the surname

2) public notice must be issued in two prominent local newspapers (one English national daily and one regional vernacular newspaper).

3) The Central Government requires a Gazette of India Notification to legally acknowledge changes or additions in service records.

4) submit application addressed to the Head of Office (HoO) / Appointing Authority of the Ministry or Department where your father was employed

One can change or surname at any point if time and no law prohibits that. The problem arises when the change of name may not appear in the public documents like Adhaar, PAN , Passport etc which you rely upon at the hour of need.

Therefore, after change of name or surname you have to bring the changes in those documents and publish in newspaper.  

- One can declare his name /change his name after affirming it in an Affidavit and after publishing in news papers 

- However , if you want to change his name or to add Kashyap in his name , then it cannot be possible after his demise . 

- If you have any another document with the said surname , then on that ground it may be possible. 

To add the surname "Kashyap" to your deceased father's name in a Central Government employee service record, you will need to follow a formal procedure. This process is governed by the rules laid out by the Department of Personnel and Training (DoPT).Since your father is deceased, the onus falls on you as the claimant or legal heir to initiate this change.

You can then get an affidavit to  declare your father's name with surname is one and the same and that you require this affidavit for some specific purpose (you may mention the purpose), get the affidavit notarised, after which you can get it published in local newspaper  and then along with the death certificate copy, copy of the affidavit and the copy of the newspaper, you can apply for gazette publication.

Once submitted, the notification will be published in the weekly Gazette. Keep multiple copies of this Gazette notification, as it serves as the primary legal proof for government departments.

Write a formal application addressed to the Head of Department (HoD) or the Administrative/Personnel Officer where your father was employed along with the above said copies.

The administrative department may cross-verify these documents with the original records. Once the HoD approves the request, the administrative section will make the necessary correction in the Service Book and attest it under the signature of a competent officer.

If it’s a clerical error you can change the same by affidavit or correction in the record with the said authority 

Dear Sir/Madam,

Yes, you can seek correction of your deceased father's name by adding the surname "Kashyap," but you must have supporting documents showing that he was also known by that name. If the service records are already closed, the concerned Central Government department may require a court declaration or other legally acceptable proof before making any correction.

Advocate Saurabh Agrawal

Dear Client, To update your deceased father’s name in central government service records to include his surname you should treat this as a request for correction of records rather than a name change Since your father is deceased and the entry is official the goal is to provide evidence that Udal Singh and Udal Singh Kashyap refer to the same person You should begin by drafting a formal request letter address to your departments head of office or HR department explicitly stating the discrepancy and requesting the addition of the surname Kashyap to align with his other legal documents.

The most critical step is to substantiate this request with documentary evidence You will need to prepare a notarized affidavit sworn before a first class judicial or executive magistrate This affidavit must declare that your father’s correct name is Udal Singh Kashyap Explain the previous omission and confirm that both names represent the same person Additionally you should attach self attested copies of your father’s other official identity documents such as his Aadhaar card PAN card voter ID or Birth Ccertificate where the full name Udal Singh Kashyap is already correctly recorded If you have any educational or property documents bearing the full name include those as well to strengthen your case.

Once your application and supporting documents are ready submit them through the proper administrative channel in your department Some departments may also request that you publish a notice in two national or local newspapers to provide public notice of the correct name While a gazette notification is typically used for changing your own name it can sometimes be requested by the department as a public record to resolve significant name discrepancies in official files follow up with your HR or personnel department regularly to ensure that the change is reflected in your service book and verify that the updated name is captured in any digital databases or personnel management systems used by your organization. I hope this answer helps, if you have any further query kindly do not hesitate to contact us. Thankyou

SIr/Madam,

it is suggested that the law does not permit the change in name of the deceased father, but the same can be done for your name as per your choice. 

To add the surname "Kashyap" to your deceased father's name in the Central Government service record, you need to follow the standard legal process for a name change in India. This process is generally applicable to government employees and pensioners.

The complete procedure involves these steps:

1. Prepare a Notarized Affidavit: Draft an affidavit on stamp paper, swearing your old name, the new name (with the added surname), your address, and the reason for the change. This affidavit must be notarized.

2. Publish a Newspaper Advertisement: Publish a public notice of your name change in a local newspaper. The advertisement must clearly state your old and new names.

3. Obtain a Gazette Notification: This is the most crucial step. Submit an application to the Department of Publication, Government of India, along with the affidavit, newspaper clipping, a digital copy (CD) of the notice, and the prescribed fee. Once verified, your name change will be published in the Gazette of India. This gazette notification is the primary legal proof of your name change.

A Critical Note: One source mentions that a Gazette notification cannot be issued for a deceased person. Since you are adding the surname to your father's name in his service record, this rule could be a significant hurdle. You may need to submit a collective affidavit from family members to establish the relationship and the reason for the change.

1. Submit Application to Your Department: After receiving the Gazette notification, submit a formal application to your department's administrative or pension office along with the Gazette copy, a copy of the service record, and identity proof (Aadhaar, PAN, etc.) to officially update the records.

Given the complexity, especially the potential issue with a deceased person's Gazette notification, it is highly advisable to consult your department's personnel or pension officer first to understand the specific procedural requirements and any available alternatives.

It is generally not possible to retrospectively add a surname merely because the family uses it now. Government departments ordinarily require contemporaneous documentary proof before correcting service records. 

You will require supporting documents showing that your father was also known as Udal Singh Kashyap.