I personally don't think it's great advice - you're effectively working on the promise of a third party you don't know without any structure around deliverables, timing, payments etc. What if they turn around in 6 months time and say "Oh! We don't really need that. But no worries, we don't have a contract so we're all good."
Better advice IMO is for service providers to spend a little money up front and develop their own standard form contract that they can serve up at the beginning of any engagement. If the buyer insists on using their form (say, if they're a big company) then at least they have a template to compare it to and make sure they're covered in the areas that matter.
Better advice IMO is for service providers to spend a little money up front and develop their own standard form contract that they can serve up at the beginning of any engagement. If the buyer insists on using their form (say, if they're a big company) then at least they have a template to compare it to and make sure they're covered in the areas that matter.