All coupons are valid for a specific period of time up until and including the expiration date listed. In rare cases a coupon will state "No Expiration Date."
The great majority of stores say in their coupon policy that they will only accept coupons within their expiration dates. Very few locations accept coupons past their date. If the latter is the case, make sure to verify this with the manager before redeeming. Be aware that many modern bar codes have the expiration date built in; therefore, expired coupons will not scan through. Also, know that stores will not accept coupons which have had the expiration date cut off in an attempt to prolong the redemption time.
If you have difficulty remembering to use your coupons in time, try keeping coupons that are about to expire in a prominent location, such as the front of your coupon binder, in a designated envelope, or on a list/spreadsheet. Don't get discouraged if you don't use all or most of your coupons before the expiration date! Remember that most coupons come in cycles, and you'll likely see the same or similar one again in the near future. If you don't use some of your coupons before the expiration date, donate them to military families overseas who can use them up to 6 months past their expiration date! Find out the details HERE