referral coupon question

[DrByte]

The more I read about coupons, the more confused I get.
Can a coupon that is issued to someone who signs up to my email
list be used as a discount coupon on their first purchase only,
then be used as a referral coupon after that. Or do I need to
use 2 different coupon codes.
k

What exactly do you mean by "referral coupon after that"?
Do you mean the coupon actually has zero value, no impact, no effect, but is just a mental trick to make the customer think they're getting some sort of benefit?