Looking for deals on back to school clothes? Through September 7, 2015, when you enroll your American Express card and make a single purchase of at least $75 in-store at Gap, Gap Baby or Gap Kids, you’ll receive a one-time $25 statement credit. Enrollment is limited.

To sign up for this offer through Twitter, tweet using #AmexGap. This offer is valid at any participating location in the US and US Territories, but excludes sister stores Old Navy, Banana Republic, Piperlime, Athleta and Intermix. Full terms are available here.

If you’re looking to make a purchase at one of Gap’s sister stores, you can purchase a Gap gift card in-store, which should be eligible for the credit. Gap gift cards are useable at Gap, Old Navy, Banana Republic, Athleta and Piperlime.

In summary, to take advantage of this offer through Twitter:

1. You must first have an American Express card connected with Twitter (see sync.americanexpress.com/twitter for more details on how to connect your Card)
2. Tweet using the hashtag #AmexGap
3. Receive a response message through Twitter from @AmexOffers stating that this offer has been added to your connected Card
4. Then, use your synced card to spend at least $75 in a single purchase in-store at Gap by September 7, 2015

If you don’t have a Twitter account and don’t want to create one, you may also be able to find this promo through the other Amex Offer channels:

• Your AmericanExpress.com account – Log into your online account and click on the “Amex Offers For You” tab.
• Use the American Express iPhone App and visit the ‘Offers For You’ tab in the ‘Membership’ section
• Through Facebook at amex.co/facebook

You can also find a full list of other publicly available Twitter / Amex Offers here.

If you’re not already familiar with Amex Offers and want to learn the basics of the program–including how to sign up for offers–see this guide.