Postal and Banking Information in Brunei Darussalam

Brunei business hours :

Postal Offices

Operate from 7.45am to 4.30pm daily EXCEPT Fridays and Sundays.

On Fridays, the operating hours are from 8.00am to 11.00am and 2.00pm to 4.00pm.

Banking Hours and Locations
9.00am to 3.00pm on Weekdays (Mondays to Fridays)
9.00am to 11.00am on Saturdays
Closed on Sundays and Public Holidays

Most Brunei banks handle travellers cheques and currency exchange rate.
The Singapore currency is on par with the Brunei dollar and is widely accepted here.

Citibank NA, Jln Sultan, BSB
Tel: (02) 243 983

Standard Chartered Bank, Jln Sultan, BSB
Tel: (02) 236 896

source
http://www.alloexpat.com/brunei_expat_forum/postal-and-banking-information-in-brunei-t1190.html