Some suggestions: looking at state records--Jones had updated his driver's license and voter registration address--searching the phone book or the Internet, ordering a credit check or posting a notice on the property.

FORBES: Magazine Article

What does a user see if he enters an invalid email address during registration?

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To be registered to vote in the by-election people must be 16 or over by election day, resident at the address stated on the registration form and resident in the Isle of Man for at least one year.

BBC: A man walks into a polling station

Cold emailing me simply because I subscribe to business magazines or because my email address shows up on conference registration lists is a bad idea.

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If you change your address or name, you have to tell the DVLA, so that your driving licence and car registration details can be updated.

BBC: Driving licence fines threaten two million drivers

Ports Design, our cover subject, shows a financial address in Hong Kong, where we list it, though the stores are run out of Xiamen and registration's in Bermuda.

FORBES: Keepers of the Tablets