Final answer:
Offline requisitions utilize a unique set of alphanumeric serial numbers for tracking, which are essential for accurate record-keeping and usually follow company-specific formats.
Step-by-step explanation:
The series of requisition serial numbers used for offline requisitions are typically a unique set of alphanumeric codes that a business or organization assigns to track requests for goods or services when electronic or online systems are not accessible. These numbers are crucial for maintaining orderly records of transactions, and they usually follow a specific format determined by the company's procurement policies. It's important for the entities involved to maintain a clear and consistent coding system to avoid confusion and to ensure accurate record-keeping of requisitions.