http://www.thenewspaper.com/news/23/2303.asp

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Recipients of red light camera tickets in Saint Louis Missouri could
find themselves in jail under a recently proposed city ordinance.
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Under the city's current ordinance, once the private vendor in charge of
the program drops a ticket into a regular US Postal Service mailbox, the
vehicle's owner is deemed to have automatically received, opened and
understood that citation as far as the law is concerned.

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If it gets lost in the mail, go to jail. Got to love government.