I was on Omnipod 2 years ago, before I got off for insurance reasons. With my new insurance I am able to get back on it. I have 2 boxes of Omnipods that expired in 2015. I know that by letter of the law they should be thrown away, but I am using one and it is working fine. In reality all that should have deteriorated is the battery life correct?
Battery could go bad, and possibly the FEP material that is used to make the canula could start to deteriorate over time. Same for the rubber seal that covers the fill port.
But yeah, I’d use it too!! Just keep an eye on your BG.
Maybe Insulet will swap them for you. All it costs you is a couple minutes to make the call and ask them.
Well, everything goes well, until the pod fails. It didn’t give me an occlusion error or anything, just started the death beep and the pdm read insulin delivery has stopped. First pod lasted 26 hours, second pod lasted 12 hours. The expiration date of those pods were June 2015. My new pump should be here within a week so I’m going to keep trying the old ones until then.
Did you ask if they would swap them for you?
Yeah, if you call them and indicate there was an error, I’ve never had anyone ask me “what was the expiration on that POD?” They just say, OK, we’ll send you a new one in the mail. 
On two occasions, they’ve asked us to mail back the PODs because the errors were not familiar and they indicated the PODS would be analyzed by their techs.
The way I see it is…it’s not “cheating” because you paid for them at some point!! Expired or not, there was cost associated and if you can get a new POD it seems fair to me. 
This thread got me curious about Insulet’s policy, so I called them to ask! They said they do not swap pods that have passed their expiration date. 
Agreeing with what ClaudandDaye said, they have never asked me for an expiration date either. So it comes down to if you think it is ok.