We all want to trust the people that we do business with, but it is also important to be prepared for the worst. A breach of contract can occur in many different ways, whether it's a tradesperson who hasn't done a job properly, a supplier who reneges on an agreement, or a business deal with a written contract that one of the parties has not fulfilled.
Sometimes the unexpected happens. Circumstances outside your control may prevent you from meeting your obligations - or maybe someone is not meeting their obligations to you.