That's right.@liuyz is referring to the way the payment is processed, not semantics surrounding the name of the government scheme. When money goes from a merchant to a cardholder's card it can be in one of two ways, a full or partial "refund" of a prior charge, or as a "reverse purchase" which gives rise to a totally independent transaction. Only the original merchant can initiate the first type of transaction.
Credit card points should be deductible with Refund only if they were earned with the card on purchase. When the credit/fund goes into the credit account, and it is not against a previous spending, this should be deemed as a repayment. Thus, no points deduction. This should not be difficult to implement.