Just called my CVS about the expired printables and they take those just as well as the expired ECB.
Check your CVS to see if you can do it there too.

thats so weird. my cvs would not let me use ANYTHING expired, even only 1 day! the ecb was expired 10/30 (it was only a $1) and the 4/20 crt too. i went to use them yesterday and they beeped! the printed emails stay active for like 2 weeks past expiry, so they sometimes allow them, but thats depending on the mgr. you're lucky. do they just push them through as store coups? i called corporate about a week ago because i had $30 ecb that i found (thought i lost them! baby brain!) but they said that as of june they can't reset them anymore as per new policy! so, i lost $30 oh well!

My CVS won't let me either....