If a redplum.com coupon code isn't working, consider these steps:
- Check the expiration date of the coupon code.
- Ensure the coupon code meets any minimum purchase requirements.
- Verify the code is entered correctly without any typos.
- Try using a different browser or clearing the browser cache.
- Disable any browser extensions that might interfere with the coupon code.
- Contact customer support for assistance if the issue persists.