What I have done in the past successfully is printed out my email confirmation as a PDF (and you need to make it as big a PDF as the number of tickets you're selling, so 2 tickets= 2 page PDF, etc.), and type a huge NOTE: over a blank space saying that "I, proper name, sold these tickets as I can no longer make it, and if there is an issue, call me at X-X-Xx, and that the people can just pick them up at Will Call." If the show is in demand (which this is), and the price is decent, and you're doing quick enough for StubHub to not notice, you can usually get away with it.