The document addresses a customer interface error encountered in Oracle Trading Community versions 11.5.10 to 12.0.4, specifically an 'S3 error' related to invalid address references when adding site use to existing addresses. The issue arises from mismatched values in the database for 'orig_system_reference' between different forms of account creation. To resolve the issue, the document outlines a solution that ensures consistency in these reference values during the creation of additional site uses.