Final answer:
The principle of managing accounts receivable that is not listed among the given options is cross-indexing journal entries with the postings to the ledger.
Step-by-step explanation:
The principle of managing accounts receivable that is not listed among the given options is 3) Cross-indexing journal entries with the postings to the ledger.
Managing accounts receivable involves various principles to ensure efficient handling of money owed by customers to a business. These principles include determining to whom to extend credit, accelerating cash receipts when necessary, establishing a payment period, and evaluating the liquidity of receivables. However, cross-indexing journal entries with postings to the ledger is not a specific principle associated with managing accounts receivable.