What changed: Businesses can now waive an order’s payable balance directly from the payment card on the Shopify order page when they decide not to collect it.
Who is affected
The change concerns businesses managing Shopify orders that choose not to collect an outstanding order balance. The source does not specify geographic coverage.
What it means for your business
For businesses using Shopify, this means a decision to waive an outstanding order balance can be handled directly through that order’s payment card.
What to do
Open an order whose balance you have decided not to collect and use its payment card to waive the payable balance.
When it takes effect
The announcement presents the feature as available now; it gives no separate effective date.
Source: https://changelog.shopify.com/posts/waive-outstanding-order-balances