the prior art does not allow a juristic person to apply for membership on line to obtain access to a service . the method proposed here is provided with a function to issue a group id which becomes immediately available for use upon provisional registration of a group profile by a representative of the group to apply for access to a service ; a function to tie up with a credit standing assessment function or a credit rating body to assess the credit standing of the group by using the group profile ; and a preparatory function for the representative to do necessary processing for gaining access to the service , such as registration of users , in parallel with the execution of the credit inquiry check . the convenience for the organization is increased by the possibility to accomplish membership registration on line , and at the same time the supplier of the service benefits from increased ease to attract more members .