Several reasons could cause a denysedar.com coupon code to not work:
- Invalid for items in cart: The code may not apply to the products selected.
- First-time purchase only: Some codes are valid only for first-time buyers.
- Expired code: The coupon may have expired.
- Minimum purchase requirement: Some codes require a minimum purchase amount.
- Incorrect entry: Ensure the code is entered correctly without spaces or typos.
- One-time use: Some codes can only be used once.
Contact customer service for further assistance if the issue persists.