I always bought lenses in this vending machine, there were never any problems with deadlines. But the last time I bought lenses with an expiration date of 2 days left. I wrote to Viber to the number indicated on the machine and called it. In Viber, "I haven't been for a long time", on a call, reset the call. I noticed that in the cell there is another lens with an outgoing period, and behind it there is already a good period. In general, there is no feedback from the owner. I recommend that you look at the expiration date initially in the slot machine before buying. The sediment remained, no more foot to it.