Don't fall for these popular "wives' tales," as compiled by Bankrate.com. Some of these are strange and unfamiliar to me, but maybe you've heard these rumors.

1. False: "You can float a check longer if you write in red ink."
2. False: "You don't have to pay income tax -- it's illegal."
3. False: "I'm under 18, so I can't be held accountable for a debt."
4. False: "My hotel key card has my credit-card information."
5. False: "Boycotting a few gasoline brands brings gas prices down."
6. False: "It's better if you don't sign the back of your credit card."
7. False: "You can make a pile of dough by helping a foreigner solve his money problems."
8. False: "You can now opt out of having credit bureaus give your information to anyone who asks."
9. False: "You can buy your way out of points on a speeding ticket."
10. False: "Hotel Bibles often have $100 bills tucked into them."

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