Revoking Access to Joint Marketing and Shared Vendor Accounts

Article summary: When vendor relationships end or team members change, those credentials rarely get revoked. Vendor access management for small businesses does not require complex tooling. It requires a checklist, a clear offboarding habit, and someone responsible for running it.

Most vendor relationships end with a final invoice, a handoff of responsibilities, and everyone moving on. What rarely happens is a thorough review of every account, password, application, and system that vendor could still access.

The problem is that access accumulates over time. A vendor receives a login here, a shared credential there, permissions to a cloud application, remote access to a workstation. Months or years later, much of it is forgotten.

Vendor access management starts with recognizing that ending a business relationship does not automatically end access. Building a repeatable process to review and remove that access is one of the simplest ways to reduce unnecessary risk.

It is also one of the most practical security controls a managed IT provider can put in place for a small business.

Where the Lingering Access Tends to Live

Think through the external relationships your business maintains. Marketing agencies often hold login credentials for ad accounts, social profiles, and analytics dashboards. Design firms sometimes keep access to website hosting and content management systems. 

Outsourced HR vendors may have ongoing access to payroll platforms or employee portals.

Joint campaigns add another layer. Co-branded microsites, shared email marketing lists, and joint social media profiles require coordinated access that is easy to establish and hard to track.

When the campaign ends, the access often stays.

Then there are the informal arrangements, like a contractor who was given access to a shared inbox.

The Cost of Not Revoking

According to Verizon’s 2025 Data Breach Investigations Report, third-party involvement in breaches doubled year-over-year, rising from 15% to 30% of all confirmed incidents.

Attackers target vendor accounts because they hold legitimate access. A former marketing agency whose credentials were never revoked is not a hypothetical. 

IBM’s research puts the average cost of a third-party breach at almost $5 million. For a small business, a third-party breach is not just an expensive problem. It can become a business continuity problem.

The more common problem is not a sophisticated attack. It is access that was never removed.

A former vendor still has access to a shared account. An old platform continues operating under credentials that nobody is actively monitoring. Permissions granted years ago remain in place simply because no one remembered to remove them.

That kind of exposure is far more common than most businesses realize.

A Shared Account Offboarding Checklist

Most vendor offboarding mistakes happen in the same places. This checklist covers the access categories that deserve a second look:

• Change passwords on every shared account that vendor had access to, not just the ones you think they used regularly
• Revoke OAuth connections and any app integrations the vendor set up on your behalf
• Rotate API keys used by vendor-managed tools or platforms
• Remove the vendor’s users from any role-based access controls in your CRM, ad platforms, or analytics tools
• Confirm the vendor has deleted your data from their systems, as required by your contract

This aligns with the approach our post on finding and terminating ghost accounts outlines for internal user accounts. The same habit applies to external access. Revoke early, document what was revoked, and set a review date.

Preventing Future Accumulation

Use role accounts instead of shared personal credentials

A shared Gmail or social media login is difficult to revoke cleanly. 

Role-based access, where the vendor is added as a user to a platform rather than given master credentials, means their access can be removed without changing a password that other people use.

Set access to expire at contract end

Most platforms support access expiry or scheduled user removal. 

When onboarding a vendor, build the end date in at the start. Schedule the credential review for the day the contract ends, not weeks or months later when someone finally gets around to it.

Require IT sign-off before granting vendor access

Every new vendor access grant should be logged somewhere. 

A simple spreadsheet works. The point is visibility: when the relationship ends, you have a record of what was granted and a checklist to work through. 

Combined with ongoing security monitoring, this creates a vendor access lifecycle that does not leave gaps.

Time to Review Who Still Has Access?

If you are not sure which vendors still have access to your systems, now is a good time to find out.

Most businesses discover at least one account, integration, or permission that should have been removed long ago. The goal is not perfection. It is making sure former vendors are not still connected to systems they no longer need to access.

Unbound Digital helps businesses audit and revoke third-party access, build vendor offboarding procedures, and establish ongoing visibility into who can reach your data. Call us at 423-467-7777 or contact us online to get started.

Article FAQs

What counts as a shared vendor account?

Any account, credential, or access grant that a third party holds on your behalf or alongside your team. This includes social media logins, ad platform access, CRM user accounts, hosting control panels, analytics tools, and shared inboxes. If a vendor can log in to something connected to your business, it counts.

Why is changing passwords not enough?

Changing a shared password helps, but vendors often hold access through OAuth integrations, API keys, or platform-specific user accounts that persist independently of the master password. Revoking access completely means addressing all these channels, not just the one credential you remember sharing.

How often should we audit vendor access?

At minimum, whenever a vendor relationship ends. Beyond that, a quarterly review of active third-party access catches connections that were established informally and never formally closed. Build it into your regular security review schedule so it becomes a habit rather than a one-time event.