Purchase Order or Contract?

I’d be grateful for your thoughts on the following question: What determines whether an organization uses a purchase order (with additional terms on the back or separately) when buying  goods or services or instead puts all the terms in a contract?

About the author

Ken Adams is the leading authority on how to say clearly whatever you want to say in a contract. He’s author of A Manual of Style for Contract Drafting, and he offers online and in-person training around the world. He’s also chief content officer of LegalSifter, Inc., a company that combines artificial intelligence and expertise to assist with review of contracts.