"Several frauds are insider jobs or perpetrated with the abetment of insiders. Banks have to take extra care to have continuous vigil on their staff," it said.
The techniques of background check for antecedents, periodic rotations, vigilance assessments, internal audits, etc. Have to be effectively employed to know the employees better, the CVC said suggesting the need of the "Know Your Employee (KYE)" and "Know Your Partner (KYP)" norms.
It said modern day banking necessitates to work in hand with partners, agents and vendors, etc besides outsourcing, peripheral and several operational activities involve deploying and trusting outside agency's employees.
"If frauds are to be prevented, banks should have appropriate mechanism to screen their partners," the manual said.
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Due diligence on other professionals like Chartered Accountants, valuers and advocates involved in the loan assessment and sanctioning processes is also an essential safeguard, said the Vigilance Manual 2017, released by Minister of State for Personnel Jitendra Singh.
"There have been instances where some of these professionals have facilitated perpetration of frauds by colluding with the borrowers to fabricate/fudge financial statements, inflate security valuation reports and prepare defective search reports for title deeds of mortgaged property and banks have been led to overestimate the funding requirements and security cover," it said.
"Apart from obtaining the relevant documents, effort should be made to 'know the customer' in the real sense - his background, his stated activities/profession.
"Discreet enquiries be made on the suppliers/buyers to check if they are in the same line of business or are bogus entities. Such timely checks help identify frauds at an early stage," it said.
The manual said a strong system of guiding the anti-fraud initiatives should be present in the bank.
"This requires a look at the corporate governance in banks and board level ownership of the anti-fraud initiatives," it said.
It is for the first time that a special chapter on public sector enterprises, banking and insurance companies has been included in the seventh edition of the vigilance manual.
The sixth edition of the vigilance manual, which acts as a ready reckoner for the anti-corruption officials working with various government organisations, was launched in 2015.