. Perform research on customer disputes for card transactions(debit/credit) to determine if an unauthorised transaction has occured and take appropriate actions to resolve the claims..Investigating deeply and thoroughly to find out errors by monitoring transactions .. Perform Chargebacks, compile and evaluate the presentments received from the merchant..Analysing abnormal activities such as spending pattern/ amount..Make recommendations to implement changes… Show more . Perform research on customer disputes for card transactions(debit/credit) to determine if an unauthorised transaction has occured and take appropriate actions to resolve the claims..Investigating deeply and thoroughly to find out errors by monitoring transactions .. Perform Chargebacks, compile and evaluate the presentments received from the merchant..Analysing abnormal activities such as spending pattern/ amount..Make recommendations to implement changes , process improvements and tools enhancement . Show less