Small transactions through mobile banking will come under scrutiny during public examinations to prevent question paper leaks.
Banks having mobile financial services will have to monitor transections ranging from Tk200 to Tk2,000 during the one-week period before the exams and until they end.
The scanner will remain effective mainly during the Junior School Certificate, Secondary School Certificate, Higher Secondary Certificate, vocational, diploma and equivalent exams.
To this effect, the Bangladesh Bank on Thursday issued a circular. The instructions will also be applicable for e-wallet service providers.
Officials at the central bank said law enforcement agencies have information that students buy question papers from various unknown sources and make the payments though mobile banking.
"If banks find any repeated and suspicious transactions from any mobile banking account, they have to inform it to law enforcement agencies," read the circular.
"Every service provider has to spread this instruction to their distributors, super-agents, agents and customers," it added.
Currently, 26 banks provide mobile financial services in the country while I-pay and Dmoney provide e-wallet service.
In November last year, average daily transections through mobile banking was Tk1,263 crore.