Our concern is since you have put this in your bank recon before KGBS take over, so you should have bank statement regarding this.
We just would like to know when is the date of return cheque. Then, we will search it by ourself in Citibank Access.
Fyi, we tried to find it before by searched report from Nov 13-Jul 14 but we couldn't find this amount.
Therefore, we need your co-operation about this instead of call to vendor since everything is in statement for those transaction outgoing and incoming payment.