Reseller Not Found Error Explained: Causes and Fixes

Quick Answer — Unlike an Invalid API Key error, this one points to a problem with your Reseller ID, not your API Key. The three most common causes, in order of likelihood: (1) an email address typed into the Reseller ID field by mistake, (2) the Reseller ID getting corrupted during copy-paste, and (3) an old Reseller ID from a previous platform still in use after migration. Checking these three in order resolves it quickly in most cases.

Short Summary — This guide covers what the “Reseller Not Found” error means in automation panels like WHMCS, WiseCP, HostBill, Blesta, and ClientExec, its most common causes, and how to fix it. You'll also find how it differs from an “Invalid API Key” error, the correct field to check in each panel, a decision flow, and answers to frequently asked questions.

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Quick check: if the value you entered isn't a long combination of letters and numbers separated by dashes, there's a good chance you're entering the wrong value.

Expert Tip — If you ever forget where to find your Reseller ID, the path is always the same: My Account → Reseller Settings → Integration Details → Reseller ID. Bookmark that page.

1) An Email Address Entered in the Reseller ID Field

This is, by far, the most common cause. Some users fill the module's “Username” field with the email address they use to log into their panel — but DomainNameAPI expects a Reseller ID in that field, not an email address.

Fix: Copy your real Reseller ID from the Integration Details page and enter it in the module's username field; remove your email address from that field entirely.

2) A Stray Character Introduced While Copying the Reseller ID

Copying the Reseller ID from the panel and pasting it into the module can introduce an extra space or an invisible character before or after the value. The result looks identical on screen but is invalid to the system.

Fix: Copy the Reseller ID again directly from the panel and paste it straight into the field; confirm there's no leading or trailing space after pasting. If you're unsure, type the value in manually instead.

3) An Old Reseller ID Left Over After Migration

If your account has been migrated to the new DomainNameAPI platform, any Reseller ID left over from the old panel (cp.domainnameapi.com) is no longer valid. If your module is still configured with that old value, the system won't recognize the request.

Fix: Update your module settings with the current Reseller ID that was emailed to you once migration completed. If you can't find that email, you can resend it from the Integration Details page using the “Email Me My Details” button.

4) Reseller ID and API Key Fields Swapped

Entering the Reseller ID in the password field and the API Key in the username field — essentially swapping the two — can also trigger this error, because the system tries to interpret whatever's in the username field as the Reseller ID.

Fix: Double-check the mapping: Username = Reseller ID, Password = API Key.

5) Using the Reseller ID From the Wrong Sub-Reseller Account

If you manage multiple sub-reseller accounts, each one has its own distinct Reseller ID. Using your main account's Reseller ID in a sub-reseller's module configuration (or vice versa) will trigger this error.

Fix: Make sure you're pulling the Reseller ID from the specific sub-reseller panel you're trying to configure.

6) An Outdated or Unpatched Module Version

An old module version may send the Reseller ID to the API in the wrong format or under the wrong parameter name, which the system then fails to recognize.

Fix: Download the latest module file for your panel from the official GitHub repository, overwrite your existing files, and re-save your Reseller ID and API Key.

One more check if you're specifically seeing Unauthorized or Access Denied: confirm your current server IP is whitelisted under Integration Details. This one catches global resellers more often than you'd expect — moving behind Cloudflare, rotating AWS or load-balancer IPs, or switching hosting providers can silently invalidate an IP that used to be whitelisted, even though your Reseller ID and API Key haven't changed at all.

1. Is the value in the username field your Reseller ID, or your email address?

— Email address → Replace it with the real Reseller ID from your Integration Details page.

— Reseller ID → Move to step 2.

2. Could a space or stray character have been introduced while copying the Reseller ID?

— Yes → Re-type the value manually.

— No → Move to step 3.

3. Have you recently gone through an account migration?

— Yes → The Reseller ID from your old panel is no longer valid; use the current one from the new platform.

— No → Move to step 4.

4. Do you manage more than one sub-reseller account?

— Yes → Confirm you're using the Reseller ID that belongs to the correct sub-reseller account.

— No → Check your module version and your API Key.

DomainNameAPI Technical Team's Observation — Most resellers who work through this six-point checklist resolve the issue themselves without ever contacting support. The list deliberately leads with the first two items — email mix-ups and copy-paste errors — because that's where the majority of cases turn out to originate.

For every official module update in one place, visit the Domain Name API GitHub organization.

What's the difference between a Reseller ID and an API Key?

Your Reseller ID is a unique identifier for which reseller account a request is acting on behalf of, and it goes in the module's username field. Your API Key is the authentication credential for that account, and it goes in the password field. Both are sent together with every request.

Where can I find my Reseller ID?

In your reseller panel, go to My Account > Reseller Settings > Integration Details to view your Reseller ID. You can also have it re-sent to your registered email using the “Email Me My Details” button.

Is my Reseller ID the same as my email address?

No. Your Reseller ID is a completely separate value from your email address — typically a long combination of letters and numbers. It's shown separately on the Integration Details page.

Why am I still getting a Reseller Not Found error when my API Key is correct?

Because this error isn't about your API Key at all; the system checks for a Reseller ID match first. If your Reseller ID is wrong, missing, or in the wrong field, the error persists regardless of how correct your API Key is.

Can I still use my old Reseller ID after a migration?

No. If your account has been migrated to the new platform, the Reseller ID from your old panel is no longer valid. You need to use the current Reseller ID issued to you after migration.

I manage multiple sub-reseller accounts — which Reseller ID should I use?

Each sub-reseller account has its own unique Reseller ID. You need to pull the Reseller ID for the specific account you're configuring from that sub-reseller's own panel; your main account's Reseller ID won't work for sub-reseller operations.

Which field should the Reseller ID go in?

In most panels, the Reseller ID goes in the “Username” field, and the API Key goes in the “Password” field. Field labels vary slightly between panels, but the logic is the same.

Can my Reseller ID change?

Your Reseller ID is a fixed value tied to your account and doesn't normally change. A platform migration is the one exception — in that case, a new Reseller ID is issued and the old one becomes invalid.

Is Reseller Not Found the same as Unauthorized?

No, they point to different things. Unauthorized usually relates to an API Key or IP-authorization issue, while Reseller Not Found specifically means the Reseller ID didn't match anything in the system. They're resolved through different checks.

Does updating the module change my Reseller ID?

No. Updating module files only changes the connection layer between your panel and the API; your Reseller ID, API Key, and domains are unaffected.

I accidentally shared my Reseller ID with someone else — what should I do?

A Reseller ID alone can't grant access to your account (the API Key is also required), but as a precaution, it's a good idea to contact our support team and have them review your account.

How do I confirm my Reseller ID is entered correctly?

Go into your module settings and run a balance check or connection test. If it succeeds, your Reseller ID and API Key are both working correctly together.

→ Create your free reseller account now

→ Learn more about the Domain Reseller Program