If you send the cheque, it is advisable to send through the Registered AD and see to it that the cheque does not bounce. This will invite another criminal case against you u/s 138 of NI Act. It would be wise to send the money by money order, although it can cost something more for you, you are pretty safe.
Dont let the ohter party know about the recordings. Let them be the surprise in the court at the time of your defence. Even in 498a, do not show to police.