Originally Posted by bhatnasx

Welcome to Flyertalk, Lexis9526!

If I recall correctly, as it's been a while since I used the SA discount, you don't need to actually have a number, do you? If you're traveling between stations with the kiosks to check-in, you shouldn't require it as you won't run into anyone asking to see it. But try the discount codes first as some of them will produce better discounts than SA.