Web applications play a vital role in the IT field for satisfying the web customer. The customer always depends on the online transaction processing system. The web application has various forms which gives a complete service to the customer. These various forms have options that are used to satisfy the customer’s needs because of the attraction over web sites existing in the global market. The traditional web pages will be closed from the current session whenever the customer selects an improper option because of single sign-on property. Selection of wrong option that is not suitable for the current session will lead to reliability problem. If the same user needs the same service, again he has to navigate from home page to the required page, thus adding up extra burden on customer. The customer session should be maintained properly, so that the customer’s satisfaction is retained over the online web application. The existing system classifies the user with their access level and also their fault level. The main objective of the proposed work is to manage the credential in all levels in order to keep the valuable customer for a long time of access in the current session. The credential management and session management are used to manage a multilevel credential from web client to web resource level and vice versa. The options selected by the customer can be classified based on the fault and type of access. The credential management also performs the maintenance process for fixing the fault tolerance level to the web user. A complete log is recorded to trace the overall process in the online transaction processing.