Related to this question What is the point of authority to sign clauses in contracts?
The simplest example I can think of is a work contract. Manager Bob signs a contract saying you will get paid $20/hr to work at Jo Pizza. Is the contract between you and Bob or you and Jo Pizza (an incorporated business)? Are there any common terms in contracts that make it clear? Do 'authority to sign' clauses have anything to do with it?
Is this why contracts are often written in the form:
This Agreement is entered into by and between Sam (an individual) and Jo Pizza (a Delaware Corporation).
Sam will make good pizza and get paid $20/hr. Payment happens on ...
In witness where of:
Bob's signature (general manager of Jo Pizza):