The Central Board of Direct Taxes has suggested to income tax departments across the country to go slow on refunds for at least a fortnight, till the process is done.

Meantime, it has directed a revamp of the security system in the software of the department, which include changing the passwords and sanitising the other security buffers.

Over the fortnight, all officers have been asked to take stock of refund claims and check their validity.

Last week, around Rs 11 crore of refunds were discovered to have been stolen, by hacking into the password of one of the assessing officers in charge of crediting the refunds into the electronic clearing system. The amount was credited to fake accounts . Sources said all these amounts were on electronically filed returns.

The Mumbai income tax office has sent the case to the Central Bureau of Investigation for tracing the beneficiary. Banks have been asked to help.

Refunds in 2009-10 are double the amount witnessed last year at the same time, at Rs 12,421 crore . In January 2008-09, the tax department refunded Rs 6,899 crore. Sources said refunds this year are high since these were deferred last time.