How to bill out my rewards accessories

[InBloom94]

How do you bill out the accessories when someone wants to use their my rewards points? I know you have to print the voucher and service has to make an RO to get the customer retention credit but my question is do you just post the accessories on the ro and service applies the discount and closes the ticket or does parts have to make a counter ticket? what account is used for the discount and how does the discount get accounted for? I assumed service would take the customers money if any was still owed but they tried to tell me I had to collect the money even though they made the RO?