When I was studying abroad, I lived in a temporary student dorm that was placed in an industrial district with a special permit from the government.

I tried to order a textbook online and my transaction got flagged as suspicious, so I had to call a support person, and he wasn't having it. - foreign credit card - address marked as non-residential area - sketchy email-address using their company name

Had to take the bus to a bookstore.

I also use my catch all to create unique "business" email addresses. The best encounter I had was giving my email address to retail person at a store and having them mistake me for an employee and give me the corporate discount. They asked me why I hadn't mentioned I worked for bigcompany@mydomain.

HAHAHA Same but it was in the store of Sixt (a european car renting firm)

This has happened to me too, though not at Sixt. "Do you work for our company?"

Its to the point now that unless the email address is @hotmail or @yahoo, almost everybody assumes that there is some company named domain.com that that said owner of the email works for that company.