This is something you need to discuss with your fiance. There are many business as well as personal implications to ownership of multiple pieces of real estate. You may need to have a pre-nuptial agreement. You may need business organization. Either way, you should discuss your options with one or more attorneys.
I agree with counsel regarding talking with your fiance and counsel. In addition, just because you're married doesn't mean you'll automatically get to "put your name on" properties that belonged only to him before your marriage.
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In Ohio, you have certain rights called dower rights to all real property owned by him before the marriage. This generally means that he cannot sell or convey the properties without your signature on the deed. I am thinking that the properties - or most of them may be rental properties and if this is the case, your fiance should contact a lawyer immediately to see what he can do to best protect himself, you and your personal assets.
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