backup scope sign off virtual machines

when a service in your company requires a new virtual server to be created, e.g. they are implementing a new or upgraded version of their business application, what sort of paperwork do you have them complete and sign off in relation to backup requirements. obviously in some cases not all data on every drive associated with a machine needs to be backed up, but surely the customer, which technical advice, needs to request what data on that machine needs to be backed up. I am not sure how the process works at your company or what you call such requirements forms, so it would be interesting to here the best practices and may be the terminology you use for such paperwork so I can research further.