Think you're just 'playing house'? In Colorado, you might be legally married and not even know it—with all the financial liability that comes with it. We've seen couples blindsided by their marital status when creditors come calling, expensive divorce proceedings they thought they could avoid, or when one partner's medical debt suddenly becomes both partners' problem. Here's what you need to know about Colorado's common law marriage trap—and why your financial advisor should be very concerned.