Originally Posted by
Closingracer
I am like 90% sure you can't do that. Only with earned free days
Unless things have changed, yes, EC CS can retroactively apply OTF coupon or coupons to a rental that is closed (returned). However as stated previously only if the location in question accepts coupons for rentals.
Went through this with EC CS where both initial tier CS and subsequent escalation up the line to managers tried and failed to apply OTF coupons to a recently completed rental. Then a manager spotted the fact location in question (Manhattan, NYC) does not accept OTF (or any other) coupons. Spoke with the then manager (Luis A.) who confirmed that the only places in NYC who accept the things are Brooklyn and the airports.
Apparently National's system knows the difference between various coupons and earned free days. Entering a code from coupon will simply result in system kicking the request back.