This can occur if you are carrying a credit utilization above 30% frequently. For example, if you have a credit card limit with a $5,000 limit and your monthly utilization fluctuates between 30% and 80% from month to month then the credit card issuer can drop your credit utilization to 50% or lower. In fact, the credit card issuer can drop your credit utilization at any moment. For example, if you are utilizing 50% utilization on a $5,000 credit card and the credit card issuers drops that $5,000 limit to a $2,500 limit then you just maxed out your credit card because you are now utilizing 100% credit utilization.