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VDR glossary · Due diligence

What is vendor due diligence (VDD)?

Definition

Vendor due diligence (VDD): Diligence commissioned by the seller before a sale, with independent advisers producing reports that bidders can read and, often, rely on.

How it works in a data room

The seller hires accountants, lawyers and sometimes commercial or technical specialists to review the business as a buyer would. Their reports are uploaded to the data room, usually near the top of the index, and are released to bidders under reliance or non-reliance letters. Because the advisers have already worked through the documents, the room is typically better organized and more complete by the time bidders arrive. Follow-up questions from bidders still run through Q&A, often answered by the VDD providers.

Why it matters in a deal

VDD lets several bidders work from the same baseline, which speeds up a controlled auction and narrows the range of surprises. It also puts the seller in control of how issues are framed. Bidders still do their own top-up review, but the scope is smaller and costs less, which can increase the number of serious offers. Our article on the vendor due diligence report explains contents and reliance in more detail.

Example

Before marketing a Dutch packaging business, its private equity owner commissions financial, tax and legal VDD. The reports are ready two weeks before launch and sit in the room’s first folder. Six bidders rely on them for first-round bids, and the winning bidder’s own advisers spend about half the time they would have needed without them. The Netherlands guide covers local privacy duties.

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