In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

To use the Posthemes coupons on their website, you need to meet the conditions:

•  The items you choose must meet all coupon requirements as explained in the Terms and Conditions.

• The coupon has not expired. 

• The seller uses the Posthemes checkout system or a customized checkout system that accepts the coupon.

It depends! Normally, the percentage that you can save with that Posthemes Coupon will be shown right on the page, so you can see if it is applied sitewide or not. However, once you are not sure, try it right on their's products you want to buy.

All deals from Promotion Programs of Posthemes are collected here. For each certain occasion, its coupons will be on the top of the coupon list, and surely they always come with an expiry date.