The couple, Sandeep Singh Atwal (32) and his wife Ramanjeet Kaur (29), are still absconding, police said.
Kaur had earlier filed an application for interim bail but was rejected by the High Court and the police is conducting raids at possible locations to nab them.
Police have arrested Sandeep's father Ajeet Singh and uncle Raghuveer Singh yesterday who were the guaranteers for the loan, Superintendent of Police, Kota, Praphulla Kumar said.
Later, Sandeep mortgaged his plot at 14-C Nursery Scheme in Talwandi area and took a loan of Rs 2.60 crore from the same branch.
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However, the plot had already been sold eight years ago by his father.
The SP said that the accused made fake signature and stamp of the commissioner of Kota Nager Nigam in the required papers submitted to the bank for loan.