To apply for a new Bangladeshi passport or to renew an existing Bangladeshi passport, a Dual Nationality Certificate is not required for individuals who have acquired UK citizenship but previously held a Bangladeshi passport. It is also not required for second- or third-generation UK citizens of Bangladeshi origin. However, individuals in these categories must provide appropriate evidence, such as previous Bangladeshi passport/NID, foreign Birth certificate, Bangladeshi Birth Certificate, Parents Bangladeshi passport/NID etc., to establish their Bangladeshi origin to apply for a Bangladeshi passport. For detailed information regarding the required documents for applying for a Bangladeshi passport please see this link: https://bhclondon.org.uk/e-passport-application
The applicants can apply online directly to the Security Services Division of the Ministry of Home Affairs following this link: https://scs.ssd.gov.bd/
Applicants applying from abroad do not need the non-judicial stamp of 300 taka. You can use the Affidavit form attached here and get it notarized by any Notary Public.
If the applicant is not born in Bangladesh or does not have a Bangladeshi passport, NID, or birth certificate, you can attach a scanned document containing the applicant's foreign birth certificate that shows the name of the parent(s), together with a Bangladeshi passport, NID, birth certificate, or Dual Nationality Certificate of at least one parent.
In this online application system, you can fill in the application form, attach supporting documents, and make e-payment by debit/credit card. After completion of the entire process, a PDF copy of the issued certificate will be generated in the system; then you can download it and make a colour printout. The whole process may take around 3 to 6 months.
If you face any technical problem while submitting the online application, you may contact the System Analyst, ICT Cell, Security Services Division, Ministry of Home Affairs, Dhaka (sa@ssd.gov.bd) and share a screenshot of the error.