Price scope changes against the original estimate, send them for approval, and keep a running revised contract value — no more "we discussed it on site" disputes.
New change order
Describe the change, price it line by line, then email or print it for the client's signature. Negative amounts work too — that's a credit (deductive change).
PDF, image, or Word — up to 10 MB each; photos are shrunk on your device before upload. Attach the signed copy here when it comes back.