If you need any correction in the Dual Nationality Certificate issued in favour of you, you may write and mail to the Embassy an application like the following:

Secretary 

Security Services Division

Ministry of Home Affairs, Dhaka

(Attention: Immigration-3 Section)

Through: Embassy of Bangladesh, Washington, DC.

Subject: Correction in Dual Nationality Certificate (DNC).

Sir,

...

with regards

(Applicant's signature and date)

Signed before me 

(Signature and Seal of Notary Public or Embassy Officer)

Enclosures:

1. The original copy and a photocopy of the issued DNC.

2. 2 copies of recent passport-sized photo of the applicant.

3. Documents in support of the desired change.

4. Money order or cashier's check of US$22.00 (twenty two dollars only) payable to the 'Embassy of Bangladesh'.

N.B. If you send the application by mail, the application must be notarized. Even in case of walk-in submission, notarized application is preferred. Otherwise, the applicant must come in-person and sign the application before an Embassy officer.