When a person has been appointed to be the guardian of a minor or a disabled person, they are responsible for the health and well-being of that individual. When they are appointed they will be required to post a Guardian Bond that ensures the court they will fulfill their duties. This differs from an executor in that an executor is responsible for the financial well-being of the person while the guardian has the responsibility of taking care of their physical well-being. Both positions tend to be required to be bonded, and can often be the same person.
While this court bond, sometimes referred to as a Custodian Bond, will be required by the courts to protect the individual that the guardian is responsible for, it also guards against unethical actions by the guardian and against the guardian acting in any way that would be considered illegal. In many states the Guardian Bond is required to protect the individual from any frivolous custody battles that may take place.