Troubleshooting Promo Codes and Gift CardsUpdated 2 days ago
TL;DR: Most codes that will not apply come down to three things: extra spaces picked up from copy-pasting, being signed in with a different account from the one the code was sent to, or conditions on the code that your order does not meet. Type the code by hand, sign in with the right email, and check the conditions. One UK-specific catch: a code issued for the Australian store will not work at the UK checkout.
3 checks
Fix most codes that will not apply at checkout
UK store only
Codes issued for the Australian store will not work here
Quick fixes to try first
Four things to check first
Type the code by hand.
Copy-pasting often picks up an extra space or hidden formatting. Typing it directly avoids that.
Sign in with the right account.
Codes are usually tied to the email address or phone number they were sent to. A different account will not carry the code.
Check the code's conditions.
Expiry date, minimum spend, product eligibility, first-order only, one use per customer.
Check it is a UK code.
The UK and Australian stores do not share codes. A code issued for the Australian store will not apply at the UK checkout.
What conditions might block my code?
Common conditions that block a code:
Minimum spend. Your order total has not reached the threshold the code requires.
Product exclusions. The code only works on particular products or collections, not what is in your basket.
First-order only. The code is for new customers and you have ordered before.
One use per customer. You have already redeemed it.
Not stackable. Another discount is already applied to the order.
Expired. The promotion window has closed.
The terms attached to your code are normally in the email, text message or page you received it from, so start there.
My gift card is not working, what now?
Gift cards go in the same combined gift card and promo code field at checkout, so the general checks apply, plus two card-specific ones.
Watch the confusable characters. Gift card codes are case-sensitive. Check zero against the letter O, and the digit one against a lowercase L.
Check the balance. If part of the card has been used, the remaining balance may be less than your order total. The card will still apply, but you will need a second payment method for the difference.
If none of that resolves it, get in touch with the code and a screenshot of the checkout error.
I placed my order without the code, can it be added?
A code cannot be applied to an order retroactively once the order has been placed.
Your code will normally still be valid for your next eligible order, as long as its conditions are still met. If you spot it straight away, get in touch quickly, because there is more the team can do before an order has been dispatched than after.
Tried everything and still stuck?
Send two things: a screenshot of the error message, and a screenshot showing the code as entered in the combined gift card and promo code field. Mention where you got the code.
With that, the team can check the code's status, issue a replacement where appropriate, or apply the discount manually if the problem is at Koh's end.
The human team works Monday to Friday, 9:00 to 17:00 Australian Eastern time. That falls overnight in the UK, so a message sent during the UK day is usually answered by the following morning.
What is the current promotion?
How Koh UK offers work, and where to find the terms that apply to yours.
Promotion terms and conditions
The live terms page for Koh UK promotions, kept up to date on the site.
Browse all Payments & Refunds articles
Last reviewed: August 2026 · Koh UK