BrewDog subscribes to the 3D Secure Payment Protection System and as such all our transactions are monitored by your banks fraud protection team. 

If you are receiving the error message ‘Zip Code Invalid’ then please check-out our FAQ HERE

Where your payment is unable to go through our secure checkout process, we would advise you contact your bank as soon as possible before trying to check out again. If multiple attempts are made without speaking to the bank, then they are likely to stop future attempts to purchase the goods but may still reserve the funds pending their review.