A corporate group is an affiliation of legally independent companies under the common management of a controlling company. It is the highest organizational unit. A corporate group can be, for example, a company with several subsidiaries that are defined, from an accounting point of view, as individual companies.
A corporate group ID is the internal identification number of a group of buyers (for example subsidiaries). This key field in the supplier registry connects suppliers to the buyers that they deliver to.
CGIDs are used when processing invoices.
Additional background: CGIDs solve this common situation: When a company consists of many merged subsidiaries that have their own ERP system, each with its own supplier registry, the same supplier can exist in multiple registries but using a different supplier name and number. CGIDs map buyers and suppliers to each other, allowing multiple supplier registries to be merged into one set of master data. (See example.)