Key man risk is a concept most commonly applied to sales or technical functions — the fear of what happens when the employee who holds all the client relationships or institutional knowledge leaves. It applies equally, and often more acutely, to credit and receivables management. When one person handles all debtor contact, all payment arrangements, and all documentation of disputes and promises-to-pay, their departure can leave a creditor substantially exposed.
What gets lost when the key person leaves
The most common losses when an accounts receivable key person departs are: undocumented payment arrangements made verbally or by personal email, dispute notes held in their memory or personal files, informal understandings about disputed amounts or credit limits, contact details for debtors that were held in their personal phone, and knowledge of which accounts are genuinely contested versus which are simply being managed slowly.
New staff inheriting the ledger often face a choice between pursuing debts the previous person had effectively agreed to write down, or letting accounts slide because they do not have enough context to have a productive conversation with the debtor.
Documentation as the primary mitigation
The primary protection against key man risk in AR is systematic documentation in a system that does not belong to any individual. Every payment arrangement should be confirmed in writing — email is sufficient — and logged in the AR system. Every dispute should be recorded with the debtor's stated reason, the date it was raised, and the agreed resolution timeline. Every promise-to-pay should be logged with the date, amount, and promised payment date.
If your business relies on verbal arrangements or relies on one person's knowledge of why a particular account is at a particular stage, that is a process risk regardless of how reliable that person is.
System and access controls
Debtor contact details — including all known phone numbers, email addresses, and contact names — should be held in the central AR system, not in an individual's CRM, phone, or email client. Payment terms, credit limits, and any approved deviations should be recorded and accessible to any authorised staff member.
Succession and handover planning
If a key AR person is leaving, a structured handover should include: a walkthrough of every account over a nominated threshold, documentation of all current arrangements and disputes, introduction to key debtor contacts, and a written summary of any accounts where a non-standard approach has been agreed. This is not always possible — people leave suddenly — which reinforces the importance of maintaining documentation continuously rather than relying on a handover to capture it.
When external support makes sense
If your AR function is currently managed by one person and that person is unavailable, an external provider can review your aged trial balance and make contact with overdue accounts without requiring deep institutional knowledge — because they use their own contact protocols and documentation standards. Speak to Merion if you are managing a handover or need continuity of coverage on your debtors ledger.