How can I check for Relationship Requests and Approve or Reject them in SAP Business Network?

You must sign in to your SAP Business Network Supplier Account and follow the steps as stated.

1. Navigate to [User Initials] > Settings > Customer Relationships.
2. Switch to the Classic View.
3. Click Pending to check for any pending requests.
4. Tick the checkbox of customer row in the Pending Customers listed.
5. Click Approve to accept the Trading relationship request or click Reject to decline the request.

To learn more about Customer relationship requests please refer Accepting or Rejecting Customer Relationship Requests

SAP Business Network for Procurement & Supply Chain > Administration (Buyer & Supplier Account Administration)