Full Glossary
Cataloging

Lot Number

A unique sequential identifier assigned to each lot in an auction catalog. Lot numbers determine the order of sale, are used for bidding reference, invoicing, and pickup coordination. They are typically numeric (001, 002, 003) but may include alpha suffixes (1A, 1B) for inserted lots.

How It Works in Practice

Consistent lot numbering is critical for smooth auction operations. Numbers must match between the catalog, the bidding platform, the photos, and the physical tags on items. Mismatched lot numbers cause bidding confusion, invoicing errors, and pickup disputes. In AI cataloging workflows, photo filenames often encode lot numbers (LOT001_front.jpg, LOT001_back.jpg) to automate photo-to-lot assignment.

Frequently Asked Questions

How are lot numbers assigned?
Most auctioneers assign sequential numbers during the walkthrough, either physically tagging items or noting them in a spreadsheet. Numbers typically start at 1 or 001. Alpha suffixes (1A, 1B) are used for lots added after initial numbering. Some auctioneers number by room or category (100s for furniture, 200s for jewelry). The key is consistency — the same number must appear on the tag, in the catalog, and on the bidding platform.

Related Terms

LotCatalog OrderAuction Catalog

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