The Valero Credit Service Center typically has specific exclusions regarding transactions that do not earn rewards. Generally, purchases such as balance transfers, cash advances, and fees related to the credit card itself, such as late fees or annual fees, are often excluded from earning rewards. Additional exclusions may include transactions made for gambling or the purchase of certain types of gift cards. It is crucial for cardholders to review the terms and conditions associated with their particular credit card, as the exact exclusions can vary. For the most accurate and up-to-date information, cardholders should refer to the official Valero website or the documents that accompanied their credit card agreement, which contain the comprehensive rewards program details.