This Imgur post by user Exsupervillain shows two pictures of a wedding invitation so non-traditional that it scared the daylights out of some of the recipients. That's because the invitations look like court summons.
Apparently, Exsupervillain's aunt is marrying a sheriff, so to honor the occasion, they sent out these wedding invitations that "nearly gave everyone a heart attack."
To make the invitation/summons look more real, the couple even used envelopes that say "Urgent" on the outside. That lets the person receiving the letter know that A. it's a very serious matter, or B. the letter is from Foreigner.