Receiving offers from users without Profile?

I received an offer from a user who I found out after checking did not have a user profile. After I informed them of this they claimed they just joined Astromart today. My question is, is this possible not to have a profile but be getting offers sent to my email address? This person also sent me a supposed notification of PayPal payment but the payment was not in my PayPal account and the "PayPal" e-mail came from this individuals e-mail and not PayPal itself.