Hi Garreth, 

Thank you for reaching out on this. 

The Signature requirement might have been entered as "Messages" on your quotes. To change customer-facing messages, please check out the instructions included in this article:

• How to set up or change customer messages

  • https://quickbooks.intuit.com/community/Help-Articles/How-to-set-up-or-change-customer-messages/td-p...

Please let us know if you require additional assistance on this. Thank you.