I was somewhat surprised to receive a wedding invitation a few years ago on Facebook and nowhere else (the groom assured me he had sent a print one, but it never arrived), but this takes the biscuit. In December 1905, my great-great-grandparents posted this in the Jewish Chronicle:
Mr. and Mrs. J. ANKER, 46, Holly-avenue, Jesmond, with Mr. and Mrs. E. GOLDSTON, "The Square", Stockton-on-Tees, will be pleased to see all relatives and friends at the Synagogue, Leazes Park-road, Newcastle-on-Tyne, on January 2nd, 1906, on the occasion of the marriage of their daughter Eva, to their son Joshua. Ceremony at 2.30 p.m. Reception at the "Minories" Assembly Rooms, Jesmond-road, 4 till 7 p.m.Which is all well and good until you come to the last line, for which remember that they chose to publish this in a national newspaper—and indeed the births, marriages and deaths column was at that point on the front page:
Relatives and friends please accept this, the only invitation.