Posted on 19/06/26 09:12 am
You open your first Etsy shop, spin up an eBay account, and maybe test the water with Amazon Seller Central. Everything goes smoothly until a verification SMS is required — and suddenly the same personal number you've already used on one platform is being asked for on another. Or your number gets flagged. Or you change phones and lose access to two-factor authentication entirely. For anyone selling on more than one marketplace, phone verification quietly becomes one of the most friction-heavy parts of running an online business.
This guide explains what each major platform actually requires, why the rules have tightened considerably in recent years, and how sellers are handling it cleanly without juggling multiple SIM cards.
It isn't arbitrary. Legislation passed as part of the US Fiscal Year 2023 Omnibus Appropriations Act — commonly called the INFORM Consumers Act — directed online retail marketplaces to verify the identity of high-volume third-party sellers, partly to deter the sale of counterfeit goods and prevent organised retail crime rings from reselling stolen items. The knock-on effect for ordinary sellers is that platforms now treat phone verification as a compliance checkpoint, not just a security nicety.
Amazon moved first and most aggressively. Sellers are required to verify their identity using a mobile number or authenticator app every time they sign in to Seller Central — a measure introduced to protect accounts from fraudulent access attempts. Etsy, meanwhile, now requires all sellers to undergo mandatory verification, with accounts that skip it unable to list new items or receive payments. So this is no longer about ticking a box on signup. Phone verification has become an ongoing, recurring part of operating on these platforms.
Amazon's two-step verification requires both a password and a unique OTP sent to a phone or authenticator app, protecting sensitive seller information from unauthorised access. The practical issue for sellers is that this system can lock you out if you lose your phone, change numbers, delete your authenticator app, or encounter anything else that disrupts OTP delivery. For a seller running multiple storefronts under different legal entities, this means each account ideally needs its own distinct, reliable number attached to it from day one.
Etsy requires sellers to verify their phone number to open a shop, and newer sellers must also complete ID and live selfie verification to reduce fraud. One important detail worth knowing before you choose a virtual number service: VoIP numbers are frequently unreliable for Etsy's SMS verification, so a carrier-registered number tends to ensure a smoother experience. That distinction between VoIP and carrier-registered is meaningful — more on that below.
eBay's self-verification process involves ID scans, utility bills, SSN or EIN, and phone confirmation — a process that can take several days to complete. Like the others, eBay uses the phone number not just for initial signup but as an ongoing two-factor authentication anchor. If that number ever becomes inaccessible, regaining entry to the account typically requires a lengthy support procedure.
Most marketplaces tie a phone number to a single account. Attempting to use the same number across multiple seller accounts — even across different platforms — can trigger flags, verification failures, or account linkage issues that platforms use to detect policy violations. For a brand agency managing Etsy shops for different clients, a reseller operating separate eBay stores for different product categories, or a developer testing marketplace integrations, the instinct is to reach for a second SIM. But that scales poorly. Buying and managing multiple physical SIM cards is expensive, logistically awkward, and still ties you to a personal number that can be lost or ported away without warning.
This is exactly the scenario that a virtual number service is built for. The key, as the Etsy example above illustrates, is that the number needs to be carrier-registered — not a standard VoIP line — so that the OTP actually lands. You can read more about how platforms handle this in our post on how many accounts per phone number limits work across major platforms.
SMS Pin Verify provides non-VoIP, carrier-registered US and UK numbers that behave like legitimate mobile lines to the platforms checking them. You can grab a number for a single verification for a few cents, or rent a number for up to 25 days if you need a stable second-factor authentication line that stays alive across multiple logins — which is exactly what Amazon Seller Central's ongoing OTP requirement demands.
The workflow for a multi-marketplace seller typically looks like this: assign a dedicated virtual number to each seller account at signup, use that number for the initial SMS verification, then keep it active long enough to handle any re-verification prompts or 2FA logins during the early weeks of the account's life. Because the numbers are priced per use rather than as a monthly subscription, the cost stays proportional to how many accounts you're actually running.
For sellers building at scale — agencies, drop-shipping operations, developers building marketplace tools — API access means number provisioning can be integrated directly into an onboarding flow rather than handled manually each time. The Android app covers the more hands-on use cases. If you're managing multiple client storefronts or freelance profiles, the approach overlaps significantly with what we covered in how to manage multiple freelance accounts safely in 2026.
One thing sellers often overlook is what happens after the initial verification. Amazon's ongoing 2FA requirement means your registered number isn't just for signup — it's the key to your account every time you log in from a new device or session. Losing access to that number mid-peak-season is a real operational risk. Renting a number for the duration of a product launch or holiday selling window, rather than just for the initial OTP, is a sensible hedge against that scenario.
It's also worth thinking about what happens when your team grows. If a virtual assistant or co-manager needs access to a Seller Central account, sharing a personal number for 2FA creates a security gap. A dedicated virtual number owned by the business rather than any individual employee is a cleaner, more professional arrangement — and one that doesn't dissolve the moment someone changes roles or devices.
Unlike your primary phone number, which is linked to your identity, bank accounts, and personal contacts, a virtual number acts as a buffer between you and the platforms you sell on. For marketplace sellers specifically, that buffer keeps your personal number out of platform databases while giving each account a stable, independent verification anchor.
If you're setting up a new marketplace account today, the cleanest approach is to decide upfront whether you want a one-time number for the initial OTP or a rented number for sustained 2FA access. Most solo sellers starting a single new storefront only need the former. Agencies and multi-account operators should lean toward the rental option for the stability it provides. Either way, the cost of getting this right is negligible compared to the cost of being locked out of a live selling account during a busy period.
Head over to SMS Pin Verify to browse available US and UK numbers, check pricing, or explore the API if you're building something at scale. No subscription required to get started.