Credit card companies check your credit history before approving a credit limit increase because they want to assess your ability to repay the additional credit.
Why do Credit card companies check your credit history before approving a credit limit increase?
They want to make sure that you are a responsible borrower and that you are not likely to default on your payments.
They might also want to check the Payment history because It shows whether you have a history of making your payments on time.
In general, credit card companies will look at your overall debt-to-income ratio, payment history, and credit score when deciding whether or not to approve a credit limit increase.