Someone else keeps using my email address as their's and I am added to numerous email subscriptions and in the past have even had invoices sent to me that weren't mine. I think I have the person's name and address, but I can't get in touch with them. How can I locate them to let them know what is happening?
If you don't know how to verify the legitimacy of the emails, then just mark them as spam. If you have accounts with any of the retailers, log in directly through their site (not through the email), and make sure everything looks OK.