The Seller Leaves After Closing. The Know-How Should Stay.

In many mid-sized businesses, a significant part of the day-to-day operations still depends heavily on the seller.

The seller knows the key customers personally, leads pricing discussions, manages important supplier relationships and often holds knowledge that has never been fully documented.

For a buyer, that dependency should be identified early in the process.

Assess seller dependency in practical terms

The main areas to look at are:

• customer relationships
• supplier relationships
• operational and technical know-how
• internal decision-making processes

The risk increases where material revenues, negotiations or operational processes depend on one individual.

Due diligence should therefore also establish which functions the seller actually performs in the business on a day-to-day basis.

Transfer key customer relationships

In owner-managed businesses, key customer relationships are often built on years of personal interaction.

A structured overview of key customers, revenue contribution, relevant contacts, the seller’s role and ongoing negotiations can therefore be very useful.

For key accounts, a personal introduction to the buyer or the future relationship owner may also be appropriate.

Document critical know-how

Knowledge that has not yet been documented should be captured systematically before or during the transition period.

Typical areas include:

• pricing logic and individual customer terms
• calculation models
• supplier-specific arrangements
• technical processes
• ongoing projects
• escalation routes
• informal responsibilities

A practical handover list with clear owners and deadlines can help structure the process.

Define transition support clearly

If the seller is expected to remain involved after closing, the arrangement should be specific.

Typical points to address include:

• duration of the support
• expected time commitment
• specific services
• availability
• customer and project handovers
• remuneration and expenses
• required documentation

These points can be addressed in the SPA itself or in a separate transition support agreement.

Broad wording such as “the seller will support the transition” often leaves too much room for interpretation.

Conclusion

Seller dependency should be identified during due diligence.

From there, the buyer can build a clear handover plan.

Key customer relationships are transferred, critical know-how is documented, responsibilities are embedded within the business and the required transition support is agreed contractually.

That way, the parties know before closing what still needs to happen afterwards.