In Jd Edwards how to create RM or ( CO, CR) instead of -ve RU when we do auto match from a data fe

In JD Edwards auto cash process If we need to apply refunds to customers accounts ledger based  off data feed how do we get these transactions to be  RM  or (CO ,CR) instead of -VE RU.   Is it the best practice to run a job to convert the _VE  amount s to Credit  after running the Auto cash process R03B50 since the auto cash process creates -VE RU from -VE amounts which cannot be applied to a RI transaction?   Or can the Auto Cash process be modified to do  RM  or (CO ,CR) for -VE amounts?

I have done this in the past (converting -RU to RM) but  just need to know the best practice to handle refund of cash(particularly on cancelation for charged orders from credit card transactions )