Jоhn wаs а licensed physiciаn in Michigan. When he retired tо Flоrida, he started providing medical services to the people in his condo, relying on his Michigan license since he did not have a Florida license and there is no reciprocity between the two states. Isaac, John's next-door neighbor, owed John $2,000 for medical services. John will be able to enforce the contract he made with Isaac.