The US Embassy located in Dhaka has advised people who applied for an immigrant visa to prepare for the interview.
The Embassy has given advice in this regard.
The Embassy has said in a statement that if you arrive during a visa interview without preparation, the visa processing can be delayed for many months on end. On the day of the interview, the visa candidate should bring all the main citizenship documents (i.e. original).
The Civil documents will include but are not limited to valid passports, photographs of the Visa, registered birth certificates, registered death certificates, marriage certificates (Bangla Nikah Nama), police clearance etc.
In addition to that, you should also carry photographs of the candidate and the candidate petitioner.
For a complete list of documents required for the Immigrant visa interview please visit this website: http://ow.ly/nbHV50K5bof