138 n.i.act

Dear Querist

you can file a case u/s 138 of NI act, this offence is bailable offence and the  accused has right to get bail, so the case is weaker or strong is not a bail matter.

Under provisions of negotiable instruments act.sec.138  a legal notice on behalf of complainant is issued to the defaulter whose cheque is dishonored. It should be issued within 15 days of dishonor of cheque by RPAD. All facts including the nature of transaction, amount of loan and or any other legally enforceable debt against which the said cheque was issued and the date of deposit in bank and date of dishonor of cheque should be mentioned in the notice.

You have initiated a legal process by  issuing the notice of demand, now under the provisions of 138 of NI Act, you can file a private criminal complaint against them before the JMFC within 30 days from the date of expiry of the 15 days time given to them for compliance of the demand notice.  Once you have filed a cheque bounce case a separate u/s 420 of IPC is not necessary.