There can be some confusion with the use of the word “verbal”. A verbal contract can include any agreement with words, which includes both oral and written agreements. Therefore, it’s best to compare between spoken oral contracts and on-paper written contacts. One should rely on written agreements, especially for the proof that is guaranteed to back it up. However, a contract that is expressed orally is hard to enforce, for that reason that the proof may not be there, unless there are witnesses.