Prevent Pokémon card show slab mix-ups by giving every graded card a unique inventory ID and recording each movement. A slab is the sealed plastic holder containing a graded card and its identifying label. Opening and closing counts help, but they cannot show where an error occurred. The safest system also tracks cards entering display cases, sales, trades, customer review, and overnight storage.
Table of Contents
- Build a slab-level inventory before the show
- Match the physical layout to the inventory
- Verify the exact slab at checkout
- Reconcile counts while errors are still traceable
- Separate owned, consigned, and customer cards
Build a slab-level inventory before the show
Create one inventory row for every slab, even when several cards share the same set, grade, and price. Record the grading company, certification number shown on the label, card name, set, card number, grade, asking price, and your internal inventory ID. Internal IDs make similar slabs easier to distinguish.
For example, three copies of the same card might be P104, P105, and P106 rather than one line with a quantity of three. Photograph the front and back of higher-value slabs before packing. The images can help resolve a disagreement about certification numbers, label details, scratches, stickers, or which copy changed hands. They do not prove authenticity or condition beyond what the photographs clearly show.
Match the physical layout to the inventory
Assign each display case, tray, and storage box a location code. A slab's inventory row should show that location, such as Case B, Row 2, rather than simply "at booth." Use removable inventory stickers that do not cover the grading label or create confusion with the price.
Keep the same ID on the inventory sheet, price sticker, and transaction record. Limit uncontrolled movement during busy periods: A visible empty slot can provide an early warning, but it is not an inventory record. Cards may shift when staff refill cases or reorganize displays.
- Return an examined slab to its assigned location immediately.
- Move only one customer's selected slabs into the checkout area at a time.
- Keep sold, traded, and pending cards in separate labeled containers.
- Do not place customer-owned slabs inside dealer inventory cases.
- Record location changes before starting another transaction.
Verify the exact slab at checkout
Read the internal ID and certification number from the slab itself before completing a sale or trade. Do not rely only on the card image, grade, price sticker, or its former position in the case. The receipt or transaction log should identify each outgoing slab.
For trades, record both the slab leaving inventory and the slab entering it. Give incoming cards new internal IDs instead of reusing the IDs of outgoing cards. A simple handoff check reduces errors when several people work the booth: Pause if the label, sticker, database row, and agreed card do not match. Correct the record before money or cards change hands.
- One person states the inventory ID and certification number.
- A second person matches them to the transaction record.
- The slab moves directly into the buyer's hand or sold-items area.
- The inventory status changes from available to sold or traded.
Reconcile counts while errors are still traceable
Count slabs at opening, during a scheduled quiet period, and after closing. Reconcile by individual inventory ID and location, not only by the booth's total number of slabs. Use this check for each location: opening inventory, plus documented additions, minus documented sales and trades, should equal the physical closing count.
A correct booth-wide total can still hide a misplaced slab if one case is short and another has an extra card. If a slab is missing or unexpected, stop moving inventory and work backward: Do not quietly substitute a similar copy to make the count appear correct. Preserve the mismatched records until the specific slab and transaction are identified.
- Recount the assigned case, checkout area, and sold-items container.
- Review recent sales, trades, and location changes.
- Compare certification numbers instead of card names alone.
- Check whether a customer-owned or newly acquired slab entered the wrong area.
- Document the discrepancy before rearranging the booth.
Separate owned, consigned, and customer cards
Ownership needs its own inventory field. Mark each slab as dealer-owned, consigned, newly acquired, sold, or temporarily held for customer review. Consigned slabs should also carry a consignor reference and any agreed restrictions on price or trade eligibility.
Keep those details in the private inventory record rather than exposing personal information on the display sticker. Never count a customer's card as booth inventory merely because it sits in the checkout area. Place customer property in a dedicated tray with a temporary reference until the evaluation, purchase, or trade is finished.
