I was told the same thing. It has to be issued by the state and not the hospital. Most states have a request form on their websites some place.
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Recruiters CANNOT use the one issued by the hospital. You can, for most states, order the State's birth certificate online.
For your state (Allow 4-6 weeks for processing applications):
http://www.health.state.mn.us/divs/chs/osr/birth.html