<prompt> Human: Basically what the title says. I have 2 credit cards though Chase. One only had a 2K limit, the other 8,500. I logged into my account today and the 2K one has gone up for 4K, and the 8,500 one is now 14,500.First of all, are they even allowed to do this? Im sure they consider it a courtesy, but how can they change my accounts without my approval?And second, are there any potential consequences to my credit score here? Wont it be more difficult for me to open accounts elsewhere? Going forward, is it better for me ask them to return my limits to where they were, or just leave them at the higher limits theyve been changed to?  <response>: This is common. They are allowed to do this. You dont have to use all of your available credit if you dont want to. This will increase your credit score because it will lower your utilization percentage. 