Blank cheque drawn as security but deposited in bank and got bounced

There is a cheque bounce case..wheein a blank cheque was given as sureity to an indivisual without any bond or legal documentation i.e there was also no liability bt now the person wrote a ridiculous amount and put the cheque in bank ..now tht person is claiming to put cheque bounce case..wud thr be a warrant issued or jst a legal notice thr was no liability or promise to pay..thencheque was provided as a sureity against a car tht was borrowd to keep for driving purpose bt the person who took cheque conned by writing a 5 lakh value and putting a case ..