The word or words (again, we have no idea) is/are 18 letters long, and contains the following letters:
1 S (the only capital letter in the group)
1 l (or possibly a capital I) <---tricky point #1
2 u (or 2 n) <---tricky point # 2
It's not customer service or gift certificates, we ruled those out. Can anyone think what might be spelled out at a mall customer service desk?
Please help! I'm totally spent, and curiosity won't let me go!