The visa office does not accept anymore any visa application by mail or by carrier for any regular short or long stay visas.
All regular visas will need to be applied for in PERSON at the visa office in Washington DC.
This includes :
Employees of international organisation applying with a regular passport
Holders of G4 & H1B visas on regular passports
Employees of embassies and foreign missions in the US holders of a regular passport.
All concerned applicants need to make an appointment online on this website to come at the visa office.
Exclusions : Diplomatic and Official (official, service or special) passport holders stay excluded of this requirement. Their application package can still be dropped off at the embassy (minimum time process: 4 to 5 business days, and up to 2 months, depending on the nationality)