Yes, customers of Washington Mutual Card Services can often request a credit limit increase. The ability to increase a credit limit may depend on various factors, including the customer’s credit history, account standing, and payment behavior. Customers generally have the option to submit a request through their online account or by contacting customer service. It is important to review the specific terms and conditions associated with the credit card, as they may outline the eligibility requirements and the process for submitting a request. Additionally, customers should be mindful that a credit limit increase request may result in a hard inquiry on their credit report, which could temporarily affect their credit score. For the most accurate and up-to-date information about how to request a credit limit increase and the specific requirements, it may be helpful to check the Washington Mutual Card Services website.