To place an order, you must first create an account and then log in.
If when you attempt to complete your purchase you are blocked from selecting a "Shipping Method" as per the image below do not worry, this can be rectified.
Select the "Addresses" page on your account (See below) and delete any existing shipping address you wish to use.
Now re-enter your shipping address, as per your unique Eircode depicts here for "Postal Address" with the county of your address entered in the "COUNTY" field (for example COCORK) and this should allow you to progress with your order.
Please be sure to then complete your "card authentication" at the checkout to avoid payment being rejected by your banking provider.
If the issue persists however, please contact our Dublin based support team at help.ireland@decathlon.com