And what if I'm ordering something, singing up the contract with freelancer but then, in the middle of the worlk, I find out that I have to change the contract? Mean the project should be corrected
During the work on the project the situation may change and the demands may also change. More than that the project goals may be putted incorrect and the project would be awaiting for a freelancers for too long (due to high demands/low reward, etc.) In that case the change of the project goals and requests will be available for editing.
Nevertheless the client can't change the project if it's been already accepted by freelancer and during the work of the hired professional.