All invoices are issued in British Pound Sterling (GBP), unless otherwise indicated on our checkout page.

We accept the following payment methods:

• Visa
• MasterCard
• American Express
• PayPal
• Apple Pay
• Opal & Onyx Gift Cards

When you pay by credit or debit card, you will be prompted during checkout to select your card option. Please note that your bank or card issuer may apply additional fees (such as foreign‑exchange or service charges); these are your responsibility and cannot be refunded by Opal & Onyx.

We use advanced SSL encryption and secure payment server technology to protect your card details. In order to comply with regulations (such as the Payment Services Directive 2 (PSD2) in the UK/EU), your bank may require additional authentication (for example, via Verified by Visa, MasterCard SecureCode, or 3‑D Secure) to complete the transaction.  

Your card will be authorised (a hold placed) during checkout. Once your order has been confirmed and your payment successfully processed, the amount will be charged. If for any reason your order cannot be completed, any payment hold will be released.

The system recognizes whether or not the credit card is registered on the 3-D security programs Verified by Visa or Mastercard SecureCode.

These are security systems that have been developed to ensure that the registered card holder and the registered online retailer (Mytheresa) are involved in the transaction. If your card is part of the 3-D Secure Program, a pop-up window will appear, asking you to enter your password when making a purchase online. This window is linked to your bank and requires you to enter your SecureCode (a password that you have previously selected). Transactions can only be made by entering the correct password.

If your credit card is not registered with any of these programs, the payment can be made without further authentication. For more information about the credit card security systems, please see:

Verified by Visa or Mastercard SecureCode

The system recognizes whether the shipping address is identical to the address that has been provided to American Express as the billing address (Amex address verification system). If the address is not identical, you will be asked to provide a different shipping address in a separate email. Your shipment will not be dispatched until the authentication was successful.

Please select "PayPal" as your payment method and you will be redirected to the PayPal site automatically. If you have an existing PayPal account, you can log in using your user data to confirm the payment. If you do not have a PayPal account, you can register and proceed with the payment. Refunds from returns will be booked onto the registered PayPal account.

To redeem a gift card or promo code, enter the code at checkout in the designated field. The discount will apply immediately if valid.

• If the order total exceeds the gift card value, you may choose an additional payment method for the remaining balance.

• Any remaining gift‑card balance may be used for future transactions.

• Gift cards and promotional codes are non‑refundable and cannot be exchanged for cash.