You ship a PSA 10. Two weeks later a return request lands: item not as described. The box comes back with a slab inside — same card, same year — but the label reads PSA 8. Or the case has a hairline crack down the edge. Or it has been opened and snapped shut again. The refund goes through, and you are out the fees, the return postage, and the gap in value between the slab you sent and the slab you got back.
This is the graded-card version of return fraud. It works because a cert number reads like an identity for the item in your hands. It is an identity for a slab. It does not say which slab was in your box.
How the switch is run
- The grade swap. The buyer orders your PSA 10 and returns a PSA 8 or 9 of the same card. It is a real slab with a real cert, just a cheaper one. The refund gap is the margin.
- The crack and keep. The buyer cracks the case, keeps the card, and sends back the shell — sometimes with a lesser card inside, sometimes with nothing. A cracked case reads as transit damage unless there is something dated on your side showing how it left.
- The resubmission. The buyer cracks your high-grade slab, resubmits the raw card under a fresh cert, and returns a low-grade slab of the same card bought cheap. Your card re-enters the market wearing a new number.
All three depend on the same gap: between the moment the item leaves your table and the moment it comes back, nobody has a dated picture of what was actually in the box.
Why the cert number alone leaves you flat-footed
When a buyer returns a different slab, that slab carries its own valid cert. The label matches the card behind it. The lookup checks out. Your position — this is not the one I shipped — is a recollection, and the item sitting in front of the platform's agent looks exactly like a legitimate slab, because it is one.
Cracked cases are worse. The label sits inside the case, so a shell that was opened and closed again can carry your original label with a different card behind it. Nothing about the cert distinguishes your specific physical case from another copy of the same case.
Platforms work from what is documented. They run their own processes on their own criteria, and no seller sits on that side of the table. The only part of this you control is whether your side of the file is a story or a set of dated photographs with numbers in them.
What a seal will not do
Start here, because the rest of this is only worth doing if you are honest about the limit.
- A seal can be peeled off and a new one put in its place. It is printed vinyl. Someone who wants a case open can get it open, and someone with a printer can make a sticker. Say that out loud before you build a workflow on top of it.
- It says nothing about the card inside. Not the grade, not the year, not whether the card is what the label says. A seal is a number on the outside of a case.
- No marketplace treats a seal specially. There is no field for it, no lookup they run, no policy that references one. A dispute is decided by the platform's own process and a sticker is not part of it.
- Serial Seal is not affiliated with, or certified by, PSA or any third-party grading company. A seal is your own marking on your own inventory.
What survives that list is small and real: a number you chose, a date, and a photograph taken before the buyer existed. That is the whole mechanism; the rest is making it routine.
What the number actually gives you
A Serial Seal is a die-cut holographic seal, individually numbered, custom branded with your own artwork or logo. The Standard size is 0.75 × 1.77 in — the shape that runs across a slab seam — in Shattered Prism or Aurora foil. Numbering is yours, not ours: pick a prefix and a scheme, and run sequential from a starting number, random codes, batch codes, or no number at all.
The number is the useful part. It gives one specific physical case a code that exists in your records and in a photograph with a date on it. That is what helps document what was shipped, and a listing that visibly shows it helps deter swaps and return fraud, because the person weighing a switch can see the order will be counted rather than remembered.
You can also put a QR on the seal, pointed at any page you choose — your shop, the listing, a live show — or at the seal record, a page showing the design, the number, and the date it was logged. That record is a record of the seal. It says nothing about the card.
Where it goes on a graded slab
A graded case has one entry: the seam where the two halves meet. Run the seal across that seam so the number sits on both halves, and keep it clear of the cert number, the barcode, and the card window — you want the label and the serial both legible in the same photo. On most slabs the long edge or the short bottom edge works; the step-by-step is in how to seal a graded slab, and the placement map for raw cards, top loaders and one-touches is in the where to put a seal on every card format hub.
If you also want a number on the outside of the parcel, that is a separate seal on the mailer flap — see how to seal a shipping package. The Large 2.5 × 1 in size suits box flaps better than slabs.
The photograph is the actual work
A seal with no photo is decoration. Frame one shot where the seal serial and the cert label are both readable in the same frame, and put that shot in the listing. The platform timestamps the listing, so the record is dated by them, before the order exists. Keep a copy locally with the order number in the filename.
One frame is enough. Shoot the image where a person can read both numbers without zooming, the same way every time, so the comparison later takes ten seconds.
Log the serial with the order
A spreadsheet is enough: order number, ship date, cert number, seal serial, photo filename. Five columns, filled in as you pack. If you would rather not keep your own sheet, the numbers in your runs are logged in My Seals, and you can look up a serial later to pull the design and the date it was logged.
The log is what makes the photos searchable on the day a return lands. Without it you are scrolling listings from three weeks ago trying to remember which card this was.
What to do when a return arrives
- Film the opening. One continuous shot, from the shipping label to the item in your hand, no cuts. Thirty seconds on a phone.
- Note whether a seal is present at all. Absent is a finding — your listing photo shows one was applied.
- Read the serial and match it to the order line in your log.
- Compare that serial to the listing photo, character by character. Codes that look alike at a glance are the ones worth reading twice.
- Read the cert number on the returned slab and match it to the cert in that same photo.
- Photograph the returned item beside your record, so both numbers are in one new dated frame.
- Submit what you have through the platform's own process, in their format, without adding claims to it.
Be clear-eyed about the last step. A mismatch between the returned slab and your dated photo is a fact you can show. What a platform does with that fact is theirs, and it will vary. The point of the routine is that you always have the same file to hand over — same photo, same log line, same video — rather than reconstructing the order from memory under a deadline.
What to say in the listing
Keep it factual and describe only the number, the photo, and the log. Something like:
This slab ships with a numbered seal across the case seam. I photograph the serial and the cert together before it leaves, and the number is kept on file with the order.
That is a description of your own process, which you can stand behind. Do not write anything that promises an outcome, describes what a seal withstands, or implies a marketplace will treat the order differently. Set your return conditions in your own policy wording, and let the photo do the rest. If you sell across several channels under one brand, branded seals for marketplace sellers covers keeping one numbering scheme across all of them.
What it costs
Standard seals are $6.00 per pack of 12 — 50c each, with a 60-seal minimum, so $30.00 gets you started. The rate steps down automatically: 45c at 120, 40c at 600, 36c at 1,200, 33c at 2,400, and 30c at 4,200. Self-serve runs go to 10,008 seals; larger runs are quoted. Large 2.5 × 1 in seals are $9.00 per pack of 12, 75c each at the 60-seal minimum, down to 45c in volume.
Against one switched slab, the per-order cost is not the deciding number. The deciding number is whether you will actually take the photo and write the line in the sheet on every order, including the busy ones.
Set it up before the next return
Pick your foil, drop in your logo or a gallery design, choose your prefix and numbering scheme, and order a run in the Serial Seal builder. Questions about sizes, numbering, or turnaround are answered on the FAQ.