Oracle EBS: EMD payment and surrogate bid

Is it possible to accept EMD and create surrogate quote with only supplier first name and last name in place?

1. When I try to access Sourcing EMD Administrator for EMD payment, the supplier with only first name, last name and phone/fax details is not seen.

2. When I add email-id and create user account by assigning proper responsibility, the supplier is seen

Are  e-mail Id and user account mandatory for EMD acceptance and further surrogate bidding?