Online banking services was highlighted as a key factor enhancing customer satisfaction and sustainable development. However, the mediating role of customer experience in the relationship between online banking service clues and customer satisfaction has received minimal attention. This study belongs to Haeckel online banking theory. Haeckel’s model in online banking fosters a more dynamic, customer-centered experience by emphasizing real-time responsiveness and adaptability as a tool of sustainable development. To determine sample convenience sampling technique has been used. Total participants to the study are 400 individual and corporate online banking user customers in North Cyprus. For statistical analyses Structural Equation Modelling (SEM) has been used. (SEM). The results showed that functional service clues positively influenced satisfaction only among individual customers, while mechanic clues positively impacted satisfaction across both customer types as a result sustainable development. In contrast, humanic clues did not affect either group. Online service clues enhanced the overall customer experience, which in turn positively impacted customer satisfaction which is the corporate’s social responsibility. However, customer experience did not mediate the relationship between online banking service clues and satisfaction. Additionally, demographic characteristics moderated this relationship. These findings underscore the importance of online banking service cues in enhancing customer satisfaction and contribute valuable insights to the digital marketing literature on customer experience in the banking sector as a sustainable development.