Your significant other may be trying to hide serious debts and foolish credit card charges alike from your prying eyes. If the sight of the mailman sets off a fear reflex, they may be dreading the moment you see one of those "PAST DUE" envelopes, correspondence with a collection agency or threat of legal action. 2. Dodging questions about their financial history/credit rating
Marriage brings with it the union of all things financial, including credit ratings. For many couples, that poses no problem and it's accepted that the good and bad will average out to a happy (and hopefully still creditworthy) equilibrium. If the mere effort to discuss your partner's financial background hits a nerve, though, their reluctance probably confirms your suspicions. 3. Letting you pay for everything
We all seem to have a friend who manages to disappear to the restaurant restroom every time the check comes, or who goes full-on ninja invisible when it is his/her turn to buy a round. If your partner is that person, don't assume they are merely a cheapskate. It could be an indication that they can't afford even a simple night out, and that could suggest damaging debt.