Glitch or questionable credit fraud?

I received a Macy's mailer yesterday containing discount coupons to be used in conjunction with my Macy's card. Problem is that I don't own nor have ever applied for a Macy's card. This is the only incident in which something like this happened. Could this be a sign that someone used my info to apply for a Macy's charge, or could it just be a glitch in company's database and I just happened to have received the mailer by accident?