N.D. Cent. Code § 29-03-21: When mailing of letter is criminal - Venue

In those cases in which the sending of a letter is made an offense, the offense is deemed completed when the letter is deposited in any post office or postal receptacle, or delivered to any person with intent that it be forwarded. The person sending the letter may be tried in any county in which the letter is so deposited or delivered, or in the county in which it is received by the addressee.