Temporary residence cards bear the following codes:

• A: shall be granted to members of foreign representations and their accompanying dependents and servants.
• B1: shall be granted to foreigners working with the Supreme People?s Procuracy, the Supreme People?s Court, the ministries, the ministerial-level agencies, the agencies attached to the Government, the People?s Committees of the provinces or centrally-run cities, and the central bodies of the mass organizations.
• B2: shall be granted to foreigners working for investment projects already licensed by the competent Vietnamese State agencies.
• B3: shall be granted to foreigners working with Vietnamese enterprises.
• B4: shall be granted to foreigners on payrolls of representative offices or branches of economic, cultural or other professional organizations of foreign countries; and Vietnam-based non-governmental organizations.
• C: shall be granted to foreigners on temporary residence in Vietnam for other purposes.

(Source: Joint Circular No.04/2002/TTLT/BCA-BNG of Jan 29 2002 guiding the implementation of the Government’s decree No.21/2001/ND-CP of May 28, 2001 detailing the implementation of the Ordinance on entry, exit and residence of foreigners in Vietnam)