<prompt> Human: I just learned that credit card companies have the ability to take away a line of credit with no warning. I have 2 credit cards 1500 limits with 0 balances. I am using them to build up my credit score and do not want them taken away.  <response>: Its their money so its their right to no longer let you have access to it.However, as long as youre a good pays on time active dont let the account go unused for 6 months customer, theres really no reason for them to reduce or take away your line of credit. 