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01_FI — Financial Accounting

Pages on FI proper: the subledgers, what posts into them, the numbering that identifies what posted, and the programs that clear it all out again.

Payments and clearing

Page What it answers
How F110 knows a payment is debit or credit Where the debit/credit sign actually lives, how the payment program groups and nets open items, and why a net debit vendor group is never paid.
Intercompany settlement, worked end to end Two company codes and four accounts, followed from the first invoice to a reconciled balance.
Why intercompany reconciliation is hard Why the two sides drift, and what actually reduces the pile.

Document types and number ranges

Page What it answers
Document types and number ranges What a document type governs, how intervals resolve per company code and year, the SD-FI RV document, and the collision between year-dependent FI ranges and SD number identity.
Numbering design for an inbound interface Dedicated document type or reuse; one type or two; internal or external assignment — and why a range register, not configuration, is what prevents cross-system collisions.
Worked decision: numbering for an inbound AR interface The same framework argued to a recommendation on a real design question, anonymized.

Recurring themes across these pages

  • The subledger sign is data, not logic. BSEG-SHKZG is set by the posting key when the document is posted. Programs read it; they don't derive it.
  • Direction is half data, half configuration. What the balance is, and what the payment method is allowed to do, are separate gates — and the configuration gate is usually the stronger argument in an audit conversation.
  • Global object, local behaviour. A document type is defined once for the client; its number range intervals are per company code and per fiscal year. Most multi-country numbering problems are solved at the interval, not by minting new document types.
  • "Clearing job" is ambiguous. F110 moves cash; F.13 only matches. Half the confusing questions in this area come from the two being called the same thing.
  • Intercompany doubles everything. Two books, two documents, one economic fact. Most intercompany pain is the cost of keeping those two views equal.