The Buying Entity Supplier ID is the unique code in your organisation’s finance system for the supplier. It is not a mandatory field in the contract upload form and therefore it is possible to submit a contract without populating this field. An example of when this might happen would be when a contract has been awarded for a brand new supplier but there has yet been any spend with supplier.
The Buying Entity Supplier ID will have to be added to the contract at some point because without it the contract cannot match to the supplier’s spend record and any spend will therefore show as non-contracted.
To add a Buying Entity Supplier ID to the contract after it has been submitted, download the document Maintaining Contracts from Upload and Maintain Contact section of the Support Site
For any further help please contact Support.