
When someone leaves your company, you offboard the obvious things: email, Slack, the building key. What usually gets missed is the trail of software they bought. The tool they signed up for under their name. The subscription on their card that gets expensed automatically. The account where they're the sole admin. These don't leave when the person does. They keep billing, often invisibly, and sometimes you can't even log in to stop them.
Former-employee subscriptions are one of the purest forms of zombie spend — you're paying for tools owned by people who no longer work for you. Worse, they're a security problem: an account a departed employee can still access is an open door. Here's how to find them, reclaim them, and stop creating new ones.
Most zombie spend is just forgotten. Former-employee subscriptions are forgotten and hard to act on, for three reasons:
Take your list of people who've left in the last year or two. Then run a discovery pass on your billing trail and look for two signals: tools whose signup or admin emails belong to a former employee, and recurring charges that began under someone who's gone. Their name in a "welcome to" or receipt email is the giveaway.
Former employees often bought tools on personal cards and expensed them. Scan past expense reports for recurring software reimbursements — these can keep getting approved on autopilot even after the person leaves, if the charge predates their departure and nobody flagged it.
In tools you can access, check who holds admin and billing-owner roles. Departed employees frequently remain as the sole admin or billing contact, which is both a spend risk and a security risk.
If you use Google Workspace or Okta, check which apps a departed employee still had access to. Apps outside SSO won't show here — which is exactly why they're the dangerous ones.
For each former-employee subscription:
The fix is to make software part of offboarding, the same as email and badges. Build a step into your offboarding checklist:
And prevent the upstream problem with two habits: ask employees to use company email for company tools (purchases on personal email are invisible to the company), and route software receipts to a shared billing inbox so ownership doesn't disappear when a person does.
The reason former-employee subscriptions persist is that the billing evidence is scattered and nobody's watching the right inboxes. InvoiceAgent scans the billing trail in your connected inbox to surface exactly these signals — signup and receipt emails tied to specific people, recurring vendors with no current owner, and tools that are still billing but haven't been touched. It turns "I bet we're still paying for some of Dana's old tools" into a specific, actionable list.
When someone leaves, their work stays and their access should go. Make sure their subscriptions don't quietly become permanent.
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