How do I stop Etsy coupon codes from being used by non-customers?

Hi! If this was set up through Etsy’s Targeted Offers (“Say thank you with a discount” / abandoned cart / favorited item), you can stop it from being sent to anyone new, but you generally can’t fully revoke codes that were already emailed—they’ll stay usable until they hit their built-in expiration (the “thank you”/returning-buyer offer can remain valid for up to 1 year from when it was created/sent, which is what you’re seeing).

A couple clarifications that usually solve the confusion:

• Targeted Offer codes vs. regular shop coupon codes
  • Targeted Offers: turning the campaign off stops future sends, but doesn’t invalidate previously sent coupons.
  • Regular shop coupon code you created manually (and maybe shared anywhere): deactivating/ending that coupon should stop it from working for everyone pretty much immediately.

On the “can I restrict it to verified returning customers only?” part: Etsy doesn’t give you a way to make a normal, guessable code like “THANKYOU” only work for “past buyers” if someone else types it in. The safest approach is:

• Use a hard-to-guess code (not a common word), and
• Keep it only inside Targeted Offers (don’t place it in listing photos/descriptions/social posts).

What I’d do next in your situation:

1. Leave the old returning-customer/thank-you offer off (so no more emails go out with that easy code).
2. Create a new Thank You / returning customer offer with a brand-new, unique code (something like THANKYOU-7F3K9, not a real word).
3. If you’re worried about margin, add “guardrails” like a minimum order or exclude certain items, so an unexpected use doesn’t hurt as much.

If you tell me whether that discount was created under Marketing → Sales and discounts → Targeted offers (thank-you) or as a normal shop coupon, I can tell you exactly what behavior to expect and where to click to confirm it’s fully ended.