<prompt> Human: I wanted to increase my credit card limit and mention my business was taking off and needed an increase. The agent I spoke with said she could increase my credit limit, but also said it was illegal in the US to use a personal credit card for my business. Is this true? I have solely dedicated that credit card for my business.  <response>: It is not illegal, its just a bad idea. If you mix business and personal finances, then all your personal assets can be used to pay back debts owed by the business. And vice-versa your business assets can be claimed for personal debts. 