Proxy provider KYC is the screening a proxy network runs on its own customers: verifying who the customer is, checking them against sanctions and politically exposed person (PEP) lists, reviewing what they intend to use the network for, and binding them to an acceptable use policy. Expect it from any vendor you would trust with production traffic. A vendor that skips it is not doing you a favor, because every customer of a shared network uses the same addresses and inherits the reputation of the least careful one.
Why a proxy network screens its customers
Most software vendors verify customers to get paid. A proxy provider has three further reasons, and each of them affects you as a customer.
Abuse. A proxy network makes traffic appear to come from somewhere else. That is exactly what legitimate data collection needs, and also what credential stuffing, account fraud and ad fraud need. A network that accepts anyone attracts a disproportionate share of the second group, because they are the customers who cannot buy anywhere stricter.
Sanctions. Sanctions laws in the United States, the European Union and the United Kingdom prohibit providing services to designated persons and to comprehensively sanctioned jurisdictions. A proxy network that serves a sanctioned party is providing a service to it, and possibly helping it disguise where its traffic originates. A provider cannot comply without knowing who its customers are.
Shared reputation. This is the reason most relevant to you. On a residential or mobile network, and on any shared datacenter or ISP pool, your requests leave from addresses other customers also use. Target sites score addresses and ranges by what they have seen from them. If another customer runs a credential stuffing campaign through the same pool, the addresses you rely on are the ones that get challenged or blocked. Many of the unexplained 403 and 429 responses teams chase in their own code start in someone else's traffic.
There is a regulatory dimension too. A network known to carry fraud is a network that draws law-enforcement attention, and the July 2026 seizure of a major residential network showed that when such a network is taken down, its paying customers lose service along with everyone else.
What normal proxy provider KYC looks like
KYC on individuals and KYB (know your business) on companies follow the same pattern. The table below describes what a reasonable proxy provider KYC process asks for, and when.
| Check | What you provide | When it happens |
|---|---|---|
| Identity or entity verification | Name, email, and for a company the legal entity name, registration number and country | At signup; more depth for invoiced or high-volume accounts |
| Sanctions screening | Nothing further; the vendor screens the names and entities you supplied | At signup and continuously against updated lists |
| PEP screening | Nothing further | At signup and continuously |
| Use-case review | A description of what you will collect and from which kinds of sites | At signup, and again when usage changes materially |
| Acceptable use policy | Agreement to the policy | At signup; updates notified in advance |
| Triggered review | Answers to specific questions, sometimes documents | After an abuse report or unusual activity |
Continuous screening matters as much as the check at signup. Sanctions lists change, sometimes daily, and a customer who was clean at signup can be designated later. A vendor that screens only once is compliant on the day you joined and not necessarily since.
The use-case review is not a formality. A description such as "e-commerce price monitoring across five countries" is easy to assess. "General purpose" or "various" is the answer that should lead a vendor to ask more. Expect questions if your targets include login pages, ticketing, sneaker releases or financial services, because that is where abuse concentrates.
The acceptable use policy should name what is prohibited and how enforcement works. A policy that says only "no illegal use" prohibits nothing in practice. Read it before you sign: it is the document the vendor will apply if a report ever names your traffic.
Proportionality: when to expect more checks
Good KYC is proportionate. A self-serve customer buying a small prepaid amount by card presents less risk than an enterprise account on invoice terms, and the checks should reflect that. You should expect more depth in these situations:
- Invoiced billing. When a vendor extends credit, it takes on counterparty risk as well as abuse risk. Expect to provide the registered legal entity, its registration details, and a named signatory with authority to bind it.
- Higher-risk use cases. Traffic toward authentication flows, payment pages, or platforms known for account fraud warrants a closer review and sometimes a written description of controls on your side.
- Unusual volume or pattern changes. A sudden shift in targets or a large increase in concurrency may prompt a review. That is the continuous part of KYC working as intended.
- An abuse report. A substantiated report about traffic from your account should trigger questions, and a good vendor will ask before it suspends, except where the conduct is plainly abusive.
Proportionality cuts the other way too. A vendor that demands passport scans from every trial user, with no explanation of retention, is collecting more than it needs. The goal is enough information to make a decision, not the maximum.
What no customer screening means for you
If a vendor has no customer screening, several things follow, and none of them is visible on a pricing page.
- Your addresses are shared with whoever else they let in. On pooled products you cannot choose your neighbors. With no screening, the neighbors include the customers other vendors turned away.
- Block rates are higher than they need to be. Target sites learn from abuse, and they learn by address and range. Clean traffic from a dirty pool is still treated as dirty traffic.
- The vendor has no basis for enforcement. Without knowing who a customer is, it cannot stop a suspended customer from signing up again under another email address.
- Your own compliance review has a gap. Your due diligence file will say your vendor carries traffic for unknown parties, some of whom may be sanctioned. That is a hard sentence to defend to an auditor.
- The vendor's survival is less certain. Networks that carry significant fraud draw regulatory and law-enforcement attention, and a network that is shut down takes its legitimate customers' service with it.
This is the customer-side counterpart to sourcing risk. Residential proxy botnet risk covers the supply side: where the addresses come from. KYC covers the demand side: who else is using them. A network needs both to be clean. If you need to isolate yourself from other customers' behavior entirely, dedicated vs shared proxies explains which products allow it.
How your KYC data should be handled
KYC means handing a vendor personal data about your staff and business details about your company, so it deserves the same scrutiny as any other data you share.
- Controller or processor. For KYC, the vendor usually acts as an independent controller, because it screens customers to meet its own legal obligations rather than on your instructions. That is different from how it handles your traffic metadata. The vendor's privacy notice, not the DPA, is usually where KYC processing is described.
- Verification providers. Many vendors use a specialist identity verification or screening service. Ask which one, where it processes data, and whether it appears on the published sub-processor list.
- Retention. Screening records are often retained for a period after the account closes, to evidence compliance. The period should be stated, and the purpose limited to that. Under the GDPR's storage limitation principle, "indefinitely" is not an acceptable answer.
- Minimization. The vendor should collect what the check requires and no more. A company registration number verifies an entity; a scan of a director's personal documents may not be necessary for a prepaid account.
What a proxy provider DPA should cover deals with the data a vendor processes on your behalf; the questions above deal with the data it holds about you.
Questions to ask about a vendor's customer screening
- What do you verify at signup, and what additional checks apply to invoiced or high-volume accounts?
- Against which sanctions and PEP lists do you screen, and how often do you re-screen existing customers?
- Do you review the stated use case, and which use cases do you decline?
- Where is your acceptable use policy published, and how is it enforced?
- How do you prevent a suspended customer from signing up again?
- Which verification provider do you use, and is it on your sub-processor list?
- How long do you keep KYC records after an account closes?
The same questions appear in condensed form in the proxy provider due diligence checklist, and as a mandatory requirement in the proxy provider RFP template.
How ProxyForge screens customers
Every ProxyForge customer is screened against sanctions and PEP lists at signup, and screened again continuously rather than once. Accounts on invoiced billing go through further verification: the registered legal entity and a named signatory. Prohibited activity, restricted sectors and the enforcement process are set out in our acceptable use policy, which also explains how appeals work. How we handle the personal data involved is described in our privacy policy.
We treat proxy provider KYC as part of the same program as sourcing: a network is only as clean as its supply and its customers. The sourcing page covers the supply side and the documents available to you.