If I answer "no" to all four questions, can I be 100% certain this service isn't a CASP?
No, you can't be 100% certain — this set of questions is designed as a quick initial screening, not a complete legal determination. It can help you rule out obviously non-matching scenarios, but it can't cover every possible edge case. The actual CASP definition may differ slightly across jurisdictions, and the regulatory rules themselves are still evolving — if all four questions come back "no," this means the service currently has a lower likelihood of falling under CASP scope, but it doesn't mean this will definitely never change in the future, nor that there's absolutely no exception in an especially unusual situation.
If this determination matters significantly to you (for example, you're considering routing a large amount of funds through this platform), it's advisable not to rely solely on this quick screening — further check the official regulatory guidance in that service's jurisdiction, or consult a professional to confirm.
Question three mentions "the service asks for tax information" as a determination signal, but if the service I use has never asked this kind of question, does that mean it definitely isn't a CASP?
Not necessarily. This signal is more informative when it's present (the service provider has already determined it needs due diligence), but its absence can't directly be reverse-inferred as "this definitely isn't a CASP." Some services might already objectively match CASP characteristics, but because the rule just took effect, the service provider hasn't yet caught up with compliance, or the relevant rules in that jurisdiction don't yet clearly require it for this service, resulting in you not being asked for this kind of information yet — in this situation, the service's actual classification might already be a CASP, just with the compliance process not yet fully implemented.
This is also why it's advisable to look at all four questions together rather than only at a single question's answer — if questions one and two are both yes (the service genuinely touches your assets and also provides an exchange function), even if question three is currently no, it's still advisable to raise your alertness, since the service provider is likely to add the due diligence requirement in the future in this kind of situation.
If I discover a service has added an exchange function, changing the determination from "not a CASP" to "possibly a CASP," do my past transaction records on this platform need to be reprocessed?
This depends on the nature of transactions during the period before the new function was added — if before the service added the exchange function, everything you did on the platform was purely asset viewing or signing, not involving exchange or custody, that period's records theoretically aren't affected, since the functions at that time genuinely didn't match CASP characteristics. What genuinely warrants attention is the transactions you make on the platform after the new function was added — this is the portion where the determination has changed and needs reassessing for whether it's affected by CASP-related rules.
In practice, it's advisable that once you discover a service you use has added a function that might trigger a CASP determination, you can treat that point in time as a dividing line, going back to confirm whether your transaction records after that point are complete, and watching whether the platform subsequently starts asking you to supply identity or tax-related information — without needing any special treatment for old records from before the new function was added.
Can these four questions be applied to all jurisdictions, or do they only apply to a specific region's CASP definition?
The starting point for designing these four questions is the core functional test logic discussed in another term on this site (objective function matters more than name labels) — this core logic itself applies in most jurisdictions adopting a similar regulatory framework, but the specific determination details, thresholds, and even the CASP name itself may have different corresponding terms and rule content in different regions — you can't assume every jurisdiction's specific rules are fully identical.
If the service you use spans multiple jurisdictions simultaneously (for example, the service provider is registered in one country while you use it from another), it's advisable that after applying these four questions for an initial determination, you further confirm the specific rules that apply respectively in your jurisdiction and in the service provider's registered jurisdiction, rather than assuming one set of determination standards can fully cover every region's situation.
Another term on this site has already explained the core logic of CASP determination — it looks at a service's objectively provided functions, not what it calls itself or its marketing labels. This article doesn't rehash that principle — instead it converts it into four concrete questions you can check yourself, helping you roughly determine whether a new crypto service you're about to use might fall under CASP regulatory scope.
First confirm whether this service lets you store crypto at an address it controls, rather than you holding your own private keys. If the answer is yes (your assets are actually held in the platform's wallet rather than your own), this is typically the most direct CASP determination signal, since custody of user assets is itself one of the core functions in CASP's definition.
Confirm whether this service lets you directly convert one crypto into another, or into fiat, within the platform, without needing to jump to an external platform to complete the trade. If the answer is yes, this means the service provides a trade matching function, also one of CASP's core determination characteristics — even if this exchange function is just an add-on to the overall product rather than its main selling point.
If a service has asked or is currently asking you for information like a passport or a tax residency declaration, this is typically a concrete signal that this service's operator has already self-determined it needs to fulfill CASP-related due diligence obligations. This signal is more direct than the first two questions, since it reflects the service provider's own judgment of its positioning, rather than your own unilateral speculation.
If you've already confirmed a service currently doesn't fall under CASP scope, this judgment isn't one-time — you need to watch whether this service later adds functions like exchange or custody. A service that originally was just a viewing tool or signing interface, if it later expands with these kinds of functions, could see its determination change accordingly, requiring you to walk through the first three questions again.
These four questions aren't meant to turn you into a legal expert — they're meant to provide a quick initial screening, helping you build a sense of "this might be a CASP" alertness when you start using a new service or discover a familiar service has quietly added functions, rather than fully relying on the service provider's own marketing language. If multiple answers to these four questions are yes, this indicates a higher likelihood the service falls under CASP scope — it's advisable to watch whether your transaction records on that platform might be reported to a tax authority, and make sure your filed content matches the platform's records. If the situation is complex or uncertain, this kind of initial screening is ultimately just a starting point, and the actual legal classification is still advisable to confirm with a professional.
⚠️ This article was researched against the most current regulations and official guidance available at the time of writing, but tax rules change frequently, and the applicable rules can vary by jurisdiction and individual circumstance. This content is intended to help you understand concepts and general direction — it does not constitute formal tax or legal advice. Before filing, please verify current rules directly with the official tax authority in your jurisdiction, or consult a qualified tax professional.