Originally posted by Marc DeArmond:

I'd assume you can issue proxies for checklist cards in a limited event in which there are no checklist cards available. Imagine a 8 man draft at a small store and no one happens to open a checklist card and the store doesn't have any but players crack a couple of Flipwalkers. You just grab a plains and write KYTHEON on it in big black letters.

I wouldn't do this for constructed, but limited is another matter.

I think this is an egregious corner case (as demonstrated by empirical evidence of my own opening of ~3 cases at my LGS and confirming what Emilien stated)

Also, you CANNOT issue a proxy for a card that never existed.

Not to derail the topic, but it feels like we're getting pretty far out
into corner case land. In general we expect a player to make sure their
deck is ready to be played. I view looking at the sleeves a player has
viewed in much the way you would approach a receiver (yay football) asking
a lineman if they're onsides. The lineman will answer, but it's ultimately
not their responsibility to tell the player how to do their job.

While we can say ‘no you need new sleeves’ it's ultimately the player's
responsibility to have a functioning, legal, deck.

Originally posted by Jeff S Higgins:

I think this is an egregious corner case (as demonstrated by empirical evidence of my own opening of ~3 cases at my LGS and confirming what Emilien stated)

Perhaps this is far more of a corner case than I had originally thought. It happened has once in the two Origin drafts I've played at my local store, fortunately there were extra checklists to spare. I had figured, based on my extremely small sample size, that it would be a far more prevalent issue.