This transaction set enables trading partners to communicate detailed information about deductions under investigation or analysis. Typically, a deduction manager or third-party administrator sends the 891 to a supplier, retailer, or manufacturer in response to a deduction inquiry or as a proactive report documenting deduction research findings. The structure uses the BGN (Beginning Segment) to establish the report context, the N1 (Name) segment to identify the parties involved, and the ENT (Entity) segment to organize individual deduction records for systematic review and resolution.

For example, a major retailer like Walmart might send an 891 report to a consumer goods supplier such as Procter & Gamble detailing a series of disputed promotional deductions. The report would identify P&G as the receiving party through N1 segments, then enumerate each deduction claim through ENT loops, with supporting AMT (Monetary Amount) segments showing the dollar value of each adjustment and REF (Reference Identification) segments cross-referencing invoice or promotion numbers. This allows P&G’s accounting team to systematically review and verify each deduction claim rather than resolving them individually through phone calls or emails.