We've added the ability to add more messages / disclaimers and collection of acknowledgment to the Checkout screen.
Now you can add messages related to Shipping within the Address section.
You might want to say "Please note that deliveries can only be accepted by persons of legal drinking age" or "Please expect longer than usual delivery times in the lead up to Christmas".
It will show up on the checkout and look like this:

To collect an acknowledgment of additional Terms and Conditions, you can do that too and have a checkbox appear that looks like this:

This is in addition to the ability to add a "Join our mailing list" checkbox that we released last week.
To use these new features, simply go to Settings > Website > scroll down to the Checkout Customisation section down the bottom and you'll see these fields:
