If you are using Shopify you may be aware of changes occurring third party payment providers.    If your Shopify site is affected by the change you will notice a Red box listing the affected payment providers on your shopify home page.

To correct this, and have the payment methods still available after the 31^st of July you will need to follow the instructions provided the payment provider.  Below are links to the advice from some of the most common providers. 

Please note that we are NOT able to perform these updates for you as payment setting changes can only be made by Account Owners.  

Afterpay - https://www.afterpay.com/en-AU/shopify-update

Humm - https://www.shophumm.com/au/shopify-update/

Zip - https://developers.zip.co/docs/shopify-faqs