The Madras High Court on Monday ordered a CBI probe into the seizure of Rs 570 crores in Tirupur district during polls.
Officials on poll duty had recovered the money from three trucks during the elections in May.
DMK leader TKS Elangovan had filed a complaint alleging that the trucks had bogus registration numbers and that the currency bundles had Axis Bank seal, even though the cash was claimed by State Bank of India.
The DMK has alleged that the officials had conspired together and created fake documents to claim the money belonged to SBI.
Earlier, a senior SBI official had said that such transportations are routine, and that the SBI chest at the Coimbatore main branch alone has a capacity to hold Rs 1,500 crore, with Rs 900 crore the average limit at any point of time.