The WELCOME10 code is valid only once per customer and is available exclusively to those who subscribe to our newsletter before placing their order. If the code has already been used or if the email address is not subscribed, the system will not apply the 10% discount. Also, if the code appears at checkout but you are not subscribed, the system will automatically remove it.
For this reason, we recommend subscribing to our newsletter before placing your order to ensure the code can be successfully applied.