The vigilance had issued a notice to the schol principla seeking information on the salary and other benefits drawn by Sudhkaran's wife Smitha since 2001.
The Kerala Pradesh Congress Committee (KPCC) raised the demand at a meeting held in Thiruvananthapuram.
The Congress leader demanded a judicial inquiry into the matter.
The remembrance meet held at Ayyankali hall was inaugurated by the Chief Minister at 4 pm.
Son Chandy Oommen should succeed Oommen Chandy, says Congress leader Cherian Philip
According to the complainant, Prashant Babu collected money from her after promising to get her daughter a job as a teacher at Morazha UP School.
Two state leaders had initially planned Delhi visit after prominent groups in Kerala had taken a stand against them regarding appointment of block presidents.
'I'm confident of my innocence. I'm not afraid of probe,' state Congress chief says
If Sudhakaran is arrested in the case, he should be released on payment of Rs 50,000 surety alongside two other sureties of like sums, High Court observed
The bank is in the eye of a controversy facing multiple investigations after a ‘fake loan scam’ rocked the district.