Which cartridge, toner or drum
Why a Cartridge That Worked Before Now Fails on Your HP
The cartridge that printed fine last month may not have changed at all — your printer's firmware did. Here is what HP's own dynamic security policy actually checks, why that can flip a working cartridge to blocked, and what to ask before you buy again.
The short answer
Nothing about your printer changed the moment this message appeared; the check HP runs against the cartridge changed. HP's printers authenticate cartridges through a chip or circuit, and on models where that check includes what HP calls dynamic security, the printer can start rejecting a cartridge it accepted before. HP states this can happen after a firmware update, even to a cartridge that has been printing normally for months. The fix isn't really about the message on screen; it's about what is actually inside the cartridge you're holding.
HP is clear about what triggers the block: a chip HP did not make, or HP circuitry that has been modified. If your cartridge uses a chip HP did not make, dynamic security can stop it working, sometimes right away, sometimes only once a later firmware update re-checks it. HP is less precise about the flip side — the one sentence in its document that names an exemption covers refilled or remanufactured "Original HP" cartridges, not third-party cartridges built around a salvaged, genuine HP chip, even though the rest of the document describes the check in terms of the chip itself rather than the brand on the cartridge. The direct next step is to ask whoever sold you the cartridge whether it carries a genuine, unmodified HP chip or original HP circuitry, and treat "compatible" listing language as insufficient on its own. If they cannot confirm that clearly, plan on returning the cartridge and buying either an Original HP cartridge, or a non-HP cartridge the seller specifically states keeps the original HP chip.
What HP's dynamic security actually checks
HP sets out its position in one document, titled "HP Printers - Dynamic Security enabled printers," published on its own support site. HP's stated scope on what triggers a block is specific: dynamic security targets cartridges built around a chip HP did not make, or HP electronic circuitry that has been modified. The same document also states that dynamic-security-equipped printers are "intended to work only with cartridges that have new or reused HP chips or electronic circuitry" — a sentence that, read on its own, would cover any cartridge built around a genuine, unaltered HP chip, whoever sells it. But the one sentence in the document that names an exemption is narrower: it covers "Original HP cartridges that retain the original HP chip or electronic circuitry" through refilling, reuse, or remanufacturing. It does not separately say, in those words, that a non-HP-branded cartridge built around a salvaged, genuine HP chip gets the same treatment, and HP doesn't close that gap anywhere else in the document. HP adds a footnote that non-HP chips and modified circuitry are not produced or validated by HP, and tells buyers to check with their supplier that a cartridge has an original HP security chip or unmodified HP electronic circuitry before assuming it's safe from this check.
| Cartridge you're holding | Affected by dynamic security, per HP |
|---|---|
| A new Original HP ink or toner cartridge | No — dynamic security targets non-HP or modified chips, not genuine HP ones |
| An Original HP cartridge that has been refilled, reused, or remanufactured but keeps its original HP chip or circuitry | No — HP names this exact case as unaffected |
| A non-HP-branded cartridge built around a genuine, unmodified HP chip or circuitry (not a replacement chip) | Not stated in so many words — HP's exemption sentence names "Original HP" cartridges, not non-HP-branded ones, though its description of what the check blocks is written around the chip, not the brand; ask your seller |
| A non-HP or refilled cartridge fitted with a replacement (non-HP) chip | Yes — may work at first, then be blocked once a firmware update re-checks it |
| A cartridge with modified HP circuitry | Yes |
Why a cartridge that worked for months suddenly stopped
This is the part of HP's explanation that answers what changed. HP states that the authentication check itself can change after the printer leaves the factory, specifically in response to firmware updates delivered over the internet. So the cartridge in your hand may not be any different from the one that printed fine last month; your printer's firmware is. HP frames this as expected behavior, not a defect: a cartridge with a non-HP chip can pass the check for a while and then fail it once a firmware update changes what the check looks for. That is also why HP ties two of its own services, Instant Ink and HP ePrint, to accepting automatic firmware updates. If your printer is enrolled in either one, it is already set up to receive the kind of update that can trigger this.
What to check before you order anything
- Ask the seller of your current cartridge, directly, whether it carries an original HP security chip or unmodified HP electronic circuitry — not just whether the cartridge is listed as compatible.
- Find your printer's own product support page on HP's support site, by entering its serial number or product number, and check the current setting for automatic firmware updates. If your printer is enrolled in Instant Ink or set up for HP ePrint, automatic updates are effectively required to keep those services working.
- Decide whether staying with a non-HP cartridge is worth the uncertainty. HP states plainly that it doesn't produce or validate non-HP chips or circuitry, and that a firmware update can block a cartridge that is printing fine today.
Can the firmware update be undone?
HP does not publish a supported way to remove a firmware update once it is installed, and there is no official HP document describing a rollback procedure for this situation. Practically, that means the update that turned on or tightened this check is not something to plan around reversing. The forward-looking decision is which way to point the printer from here, not how to undo what already happened.
The forward-looking choice: how your printer takes updates
Most HP printers can, according to HP, be set to update automatically or to notify you and let you choose, so check your printer's own manual for the exact menu, since the setting's location varies by model. The trade-off HP states is direct: Instant Ink and HP ePrint both require automatic updates to keep working. HP ties changes in dynamic security specifically to firmware updates, so not accepting automatic updates is the practical way to keep your printer's check from changing further, though HP doesn't frame that as a guarantee. If you use neither Instant Ink nor ePrint, declining automatic updates is worth checking for on your model. If you do use one of them, expect the check to keep changing over time, and plan cartridge purchases around cartridges that keep the original HP chip or circuitry, rather than around a cartridge that has simply printed successfully so far.
What a non-HP cartridge is actually promising you
This is the honest answer to whether you should have bought third-party at all. A non-HP cartridge working in your printer today is not, on its own, evidence that it will keep working. HP's own footnote says it doesn't produce or validate non-HP chips or circuitry, and puts the responsibility on the cartridge seller to confirm what is inside, and on you to ask. HP's document is written around whether the chip itself is genuine, unmodified HP hardware, not around which brand's name is on the cartridge — but the one sentence that spells out an exemption talks about refilled or remanufactured "Original HP" cartridges, and doesn't separately say that a non-HP-branded cartridge built around a salvaged HP chip gets identical treatment. A cartridge with its own replacement, non-HP chip is unambiguously not exempt, and whether it keeps working depends on what future firmware updates check for. If you are weighing third-party against Original HP again, the real question is which one your specific seller is actually selling, and whether they can point to HP's own wording to back that up — not the brand name on the listing. If your printer is one of HP's newer HP+ models, check that page before you buy anything — it may change your options.
The warranty question, since it comes up
Using a non-HP cartridge does not, by itself, void your HP Limited Warranty or an HP support contract on the printer. HP is specific about one exception: if a printer or printhead failure is attributable to a non-HP cartridge, that failure is not covered. Dynamic security blocking a cartridge is not a warranty event either way; it is the printer declining to print, not damage to the printer.
If you're ordering again
Once you know which way you're going, confirm the exact cartridge number your printer takes before you buy, whether you end up choosing an Original HP cartridge or a non-HP cartridge a seller confirms keeps the HP chip. Getting the right cartridge number matters regardless of dynamic security; it is a separate check your printer runs.
HP does not publish which printer models have dynamic security enabled, or a way to look that up ahead of time. If your printer is showing this message, dynamic security is active on your unit, whatever the model number is — that message is the confirmation.
Check it on your own equipment
These take you to the manufacturers and standards bodies the page draws on, so you can look up your exact model.
- Official support page
Find your printer's own support page (opens in a new tab)A lookup by serial number or product number that opens your exact printer's manuals and support articles, including where to check or change the automatic firmware-update setting. — support.hp.com - Official support page
Read HP's dynamic security policy directly (opens in a new tab)HP's own statement on dynamic security: what it checks, why a working cartridge can later be blocked, and exactly how HP words its cartridge exemption. — support.hp.com - Merchant listing
Browse Original HP ink cartridges (opens in a new tab)HP's own original ink cartridge lineup by type, with links through to HP's store. — www.hp.com - Merchant listing
Browse Original HP toner cartridges (opens in a new tab)HP's own original toner cartridge lineup by type, with links through to HP's store. — www.hp.com
What this page does not tell you
- This page covers HP's own stated dynamic security policy only; it does not compare HP's cartridge-authentication approach to Canon, Epson, Brother, or any other printer maker, and does not say whether this practice is or isn't common across the industry.
- HP does not publish a list of which printer models have dynamic security enabled, so this page cannot tell you in advance whether a given HP model has the feature — the message on your printer's screen is the confirmation.
- HP does not publish a way to reverse an already-installed firmware update, so this page does not offer rollback instructions.
- HP's own document does not spell out, in so many words, whether a non-HP-branded cartridge built around a salvaged, genuine HP chip is treated the same as a refilled or remanufactured Original HP cartridge; its one sentence naming an exemption covers only the latter by name. This page states that gap directly instead of assuming an answer HP hasn't given.
Sources
4 documents, each with the facts on this page it supports. Manufacturers revise specifications, so every source is dated — open it before you buy.
- In HP printers equipped with dynamic security, a cartridge using a non-HP chip or modified or non-HP circuitry may not function.
- The dynamic security authentication process can change during the life of the printer, including in response to firmware updates, so a cartridge that worked before can later stop working, even one that works today.
- HP's dynamic security document names one exemption by name: refilled, reused, or remanufactured Original HP cartridges that retain the original HP chip or electronic circuitry. It does not separately state, in those terms, whether a non-HP-branded cartridge built around a salvaged, unmodified HP chip receives the same exemption, even though other sentences in the same document describe what the check blocks in terms of the chip itself rather than the cartridge's brand.
- Changes to dynamic security are delivered through firmware updates over the internet, and enrolling a printer in HP's Instant Ink program or using HP ePrint requires configuring the printer to accept automatic online firmware updates.
- Most HP printers can be configured to receive firmware updates either automatically or with a notification that lets the owner choose whether to update, via the printer's own user guide or manual.
- Non-HP chips and modified or non-HP electronic circuitry are not produced or validated by HP; HP's footnote tells buyers using a non-HP cartridge to check with their supplier that it carries an original HP security chip or unmodified HP electronic circuitry.
- Using a non-HP cartridge does not by itself void the HP Limited Warranty or an HP support contract, but a printer or printhead failure attributable to a non-HP cartridge is not covered by that warranty or contract.
- HP's own dynamic security document does not list which printer models have dynamic security enabled.
- HP does not publish an official procedure for rolling back or reversing an already-installed firmware update.
- A new Original HP ink or toner cartridge is not affected by dynamic security.
- HP's product support portal lets a visitor identify a printer by serial number or product number to reach that model's manuals, drivers, and settings, including firmware-update configuration.
- hp.com/us-en/cartridge/ink.html is HP's own page for Original HP ink cartridges, with links through to HP's store to buy them directly.
- hp.com/us-en/cartridge/toner.html is HP's own page for Original HP toner cartridges, with links through to HP's store to buy them directly.