Probably Stolen Counterfeits: How to Spot Fake Immunivax, Food Stamps and More
The rules that separate genuine goods from fakes, item by item, and why some customers see through your labels and others never do.
Updated 2026-11-04 · Game data v1.0.0.6
Recalled batches: 250, 251, 301, 355, 385, 386, 421.
To spot a fake in Probably Stolen, use the Magnifying Glass on the item to open the Inspection Tray, compare it with that item's handbook, and press Confront as soon as you find one issue. Immunivax is the easiest to check with numbers: a genuine serial has seven digits, starts with a batch from 125 to 455, is not one of seven recalled batches, and the label reads exactly "Immunivax".
The checker above tests a serial number and product name the same way the game does. The rest of this page covers the other inspectable goods.
How does counterfeit checking work?
Items that can be inspected say so in their tooltip. Drag the 
Magnifying Glass onto one and the Inspection Tray opens. If you see a problem, pick the reason at the bottom of the tray and press Confront.
The customer always claims the item is genuine and working. You need only one issue to call it, but if you are wrong, your reputation with that customer's faction may take a hit. Each item type has its own handbook, and the rules below are what those handbooks say.
How do you check an Immunivax Injector?
The 
Immunivax Injector has rules that can be checked exactly, which is why it gets the tool. The serial number is seven digits. The first three are the batch number and must fall between 125 and 455. Seven batches have been recalled: 250, 251, 301, 355, 385, 386 and 421. A recalled injector is genuine but unusable.
The name must read exactly Immunivax. Counterfeits use near-misses such as Immunovax, Imunivax, Immunivaxine, ImmuniPro or ImmuniVax 3000, and some have a letter missing from the middle of the word. Read the label character by character.
The 
Immunivax Assessment Guide lists more ways an injector can fail:
- Body — visible cracks make it unusable.
- Label — spelling errors, a missing company or product name, or a clear font mismatch. A missing label means counterfeit.
- Colors and indicator — the handbook shows the correct main colors and what a faulty indicator looks like.
- Expired or empty — genuine, but not worth full value.
How do you spot a fake Food Stamp?
The 
Food Stamp Identification Handbook gives three hard rules for the 
Food Stamp:
- Value. Stamps are only issued at 40, 80, 120, 160, 200 and 240 credits. Anything else is fake.
- Seal. Stamps of 160 credits or more always have a security seal. The handbook says stamps under 160 never carry one.
- Chip. Every stamp has a chip. If it is missing or damaged, the stamp is unusable even when it is genuine.
After those, check the lettering and the logo for spelling errors, misaligned text, wrong colors or a missing logo. Food Stamps only buy food at the Commissary. The Welfare Program perk can bring you stamps on Mondays; Banned from the Commissary means they never appear at all.
Republic logo
Lettering
Chip
How do you spot fake Hemingway Cigarettes?
A 
Pack of Hemingway Cigarettes is fake if the security seal is missing or broken — genuine packs are never sold without one. Beyond that, look for spelling errors, misaligned or uneven print, and font differences on the pack. Color is the subtle one: compare the pack against the 
Hemingway Color Checker, because a slightly wrong shade is a fake too.
Seal
Lettering
Logo
Color
How do you check a Ribwich?
The 
Packaged Rib Sandwich is both a counterfeit check and an appraisal. Every Ribwich starts at 150 credits and never drops below 40.
It is counterfeit if:
- The production date is missing or falls outside the two production runs: January 425 to December 429, and January 432 to December 438.
- The packing facility number is missing or invalid. There were 35 facilities.
- The Davre logo is missing or wrong.
- A second-run Ribwich has no Ribwich sticker, or the sticker is wrong. First-run sandwiches never have one.
- It claims to be a Deluxe Edition but has only one of the two features — sesame bun and extra pickles.
Its value changes with:
| Condition | Value |
|---|---|
| Packaging missing, torn or counterfeit | Fixed at 40 |
| First production run | +80 |
| Made in 01/425 or 12/438 | +50 |
| High-quality facility (01, 02, 05, 08, 21, 34) | +50 |
| Low-quality facility (07, 15, 18, 26, 31) | −50 |
| Valid Deluxe Edition | +300 |
| Double meat patty | +800 |
Davre logo
Ribwich logo
How do you tell water grades apart?
Water is graded by purity, and each grade changes the price. The Water Trading Manual sets the bands:
| Water grade | Purity | Value |
|---|---|---|
| Pure Water | ≥ 99.9% | +100% |
| High-Quality Water | 99% – 99.9% | +50% |
| Basewater | 98% – 99% | 0% |
| Ghostwater | 96% – 98% | -33% |
| Rustwater | 90% – 96% | -75% |
| Gutterflow | 35% – 90% | -90% |
Rustwater and Gutterflow give themselves away by color. Ghostwater does not: it looks exactly like better water, and selling it as Basewater is the classic Lower Levels scam. A 
Water Testing Strip is the cheap way to check before you buy. The manual also warns that selling large volumes of mislabeled Ghostwater is a crime.
Which items are worth inspecting?
Inspection costs nothing but a few seconds, and the handbooks each cost about 50 credits. What you protect varies a lot by item:
| Item | Base value | What a miss costs |
|---|---|---|
| Ribwich | 150, up to 1,280 more with the right features | Overpaying for a fake, or underpricing a double-patty Deluxe |
| Immunivax Injector | 160 | A recalled or counterfeit injector is worthless — and dangerous on the Sentinel Collapse perk |
| Hemingway Cigarettes | 80 | Fakes are worth far less than genuine packs |
| Food Stamp | Up to 240 face value | A stamp without a valid chip cannot be spent at the Commissary |
Buy the handbook for whatever you trade most. If you deal in Ribwiches, the appraisal guide pays for itself the first time it spots a +300 Deluxe Edition someone is trying to offload cheaply.
A good confrontation also helps you on price: when you catch a real issue, the customer backs down on the deal. A wrong one costs reputation and can send the customer away, so never confront on a hunch.
What should you check first?
Work from the cheapest test to the slowest. Each item has one rule that settles most cases:
- Seals. Hemingway packs always have one, Food Stamps of 160 or more always have one, and stamps under 160 never do.
- Numbers. The Immunivax serial and batch, the Food Stamp value, the Ribwich production date and facility number.
- Lettering. Spelling, fonts, alignment and logos on the label or print.
- Color. Compare against the Hemingway Color Checker or the injector's correct main colors.
Why do some customers catch a mislabeled item?
The 
Labeler lets you change an item's label, honestly or not. Whether a buyer notices is not a dice roll. Each type of customer has a fixed ability to see through certain labels:
- Water. Lower Levels, Security and Revolution customers use test strips and catch any water label that does not match. Upper Levels citizens, tourists, scavengers and ordinary customers only catch Rustwater and Gutterflow.
- Cigarettes. Most customers can tell a fake Hemingway label.
- Chemical purity. Only certain customers can expose an inflated purity label.
- Trade Board buyers. They catch every mismatched label.
Getting caught selling an item worth less than its label costs reputation. Vending machines are no safer: each mislabeled sale costs 1 reputation per 100 credits of value, up to 20, and adds to your Fraud and Endangerment record. The factions guide explains what that reputation is worth.
Changing any label once unlocks Lower Levels Special, the most common achievement in the game. The item database lists every item's base value, and the beginner guide covers when it is worth checking at all. For everything else, start at the Probably Stolen wiki home.
FAQ
How do you check if an Immunivax Injector is fake?
Check the serial number and the name. A genuine serial has seven digits and its first three digits are between 125 and 455, and the product name reads exactly Immunivax. Batches 250, 251, 301, 355, 385, 386 and 421 are recalled and unusable.
What values do real Food Stamps have?
Only 40, 80, 120, 160, 200 and 240 credits. Any other printed value is a fake. Stamps of 160 or more always carry a security seal, and every stamp needs an intact chip to be usable.
How do you spot fake Hemingway Cigarettes?
Look for the security seal first — genuine packs are never sold without one. Then check the lettering for spelling errors or font differences, and compare the colors against the Hemingway Color Checker.
How do you spot a counterfeit Ribwich?
Check the production date, the packing facility number, the Davre logo and, on second-run sandwiches, the Ribwich sticker. A date outside January 425 to December 429 or January 432 to December 438 means it is fake.
What happens if you confront a customer wrongly?
Your reputation with that customer's faction may drop. One genuine issue is enough to confront, so only press Confront when you have found one.
Do customers notice mislabeled goods?
It depends on who they are, not on luck. Lower Levels, Security and Revolution customers test water and catch any mislabeled grade, while Upper Levels customers and tourists only notice Rustwater and Gutterflow.