I stand corrected, yes you do need an NPIP to send hatching eggs in the mail, I meant that Hawaii is also a state that requires a separate permit that the sender has to get from the Hawaii state department of agriculture that verifies they have the NPIP among other things. Not enough to have a copy of the NPIP in the package. May be true of other states as well.In the US you have to be NPIP certified or you cannot ship eggs.
