SAP ERP Financials and FICO Handbook

236 CHAPTER 6 FICO QUICK TOUR
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one document type, and this is entered in the document
header. Document numbers are provided by the document
number ranges assigned to one or more document types. Each
document line item contains one posting key. This is used for
internal control; during complex postings it tells the system:
(1) the account type to be posted, (2) whether it is a debit or
credit posting, and (3) which fields of the line item may have or
require an entry.
The SAP software does not allow you to delete an incorrect
posting. The only way to rectify the incorrect transaction is
through a reversal of the incorrect posting. There are two types
of reversal: (1) normal reversal and (2) negative reversal. With
normal reversal, you post the reversal entry by crediting the
debit entry and debiting the credit entry. With negative reversal,
you post the reversal entry by posting entries on both the debit
and credit sides with the opposite sign.
If you are working in a corporate group environment, you will
often come across cross-company code transactions.
A cross-company code transaction involves more than one
company code. This situation arises when one company code
makes purchases for other company codes, one company
code pays invoices for other company codes, or one company
code sells goods to other company codes.
Through transaction code OBYA, you can customize clearing
accounts in both company codes.