While the term "And" requires all parties to be involved in transactions, the term "Or" typically allows any one of the owners listed to transact business without the involvement of the other. Depending on what you would like to do and how much money is involved, you may be able to take the other owner to small claims court. This may be a good option depending on how much money you lost/are owed and how much money you are willing to spend to get what's yours. Other than walking away and chalking it up to "lesson learned" you can contact a local attorney to review your situation and advise you on how best to proceed. Most attorneys will not charge for an initial consultation.
This answer is provided for informational purposes only, does not constitute legal advice, and does not create an attorney-client relationship. Florida Attorney practicing in areas of Estate Planning, Elder Law, Trusts, Probate, Guardianship, and Business Law. www.ferraezlucas.com The information provided is for educational purposes and not intended to provide legal advice or to create an attorney client relationship. Please contact me at firstname.lastname@example.org or call my office should you like to discuss your Florida legal matter further. Actual legal advice can only be provided after completing a comprehensive consultation in which all of the relevant facts are discussed and reviewed.