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Someone asks you to co-sign a loan. How to reject & say “no” nicely or politely?
I have been in this situation and I essentially went for the truthful answer.  I first explained that co-signing for a loan wasn't just vouching for the person, which I certainly would do, but it was putting my name on the loan and making me the person they loan company would go after if a payment was ever missed. Then I explained that even within married couples, money can be a major source of strife and fights, it would be even worse for someone not quite as close like a family member or friend. Essentially I wouldn't want to risk my relationship with a good friend or family member over some financial matter.