For receipt and delivery documents, it is necessary to specify the correspondents from whom or for whom the document is issued.
To select a correspondent:

The list of correspondents is not limited to selection in documents.
When selecting a correspondent, the KPP field will be automatically filled in with the default value from the correspondent's card, if the KPP is specified.

The KPP for the correspondent must be specified if the organization operates on the territory of the Russian Federation.