Did they show you a photo of the SFI tag with the wording expiration. If that is true, that is the first example I have heard of using that wording. They may be falling into the same trap as other people with the wording of "valid until" and they treat it as an expiration date. There are several reasons for the validation SFI tags--One is to muddy the waters and get you to buy new harnesses every two years. Keep in mind that the helmets we use have the SA rating and a date (SA2020) The various racing sanctioning bodies set the expiration date from the SA date. For SSCC the oldest helmets we can currently use is SA2015. Check out Crow Safety Gear.