An oral contract is, in most circumstances, just as enforceable as a written contract. Of course, the law always prefers written agreements because it is easier to define each party's rights and obligations by looking at a document. So if you have an oral agreement with another party, it is almost always better to put it in writing. This avoids confusion later. But if you do put an agreement in writing, it's important to know about the "parol evidence rule" and how that might affect what is in the contract, and what is not.
On February 4, 2018, Minnesota will play host to the largest televised event of that year: Super Bowl LII. Minnesota and U.S. Bank Stadium will be on display. But behind the scenes, a complex framework of contracts for goods and services will allow millions of dollars in value to change hands in an orderly, predictable way. But where there are high volumes of contracts, there are also breaches of contract. One party fails to pay. Another party fails to deliver goods or services. A non-party to the contract takes the money or destroys the goods before they can be delivered. A host of things can go wrong.