Undisclosed side agreements. What exactly is an undisclosed side agreement? If you look up a definition, an AI might tell you they are “separate oral or written terms that modify, supplement, or contradict a main contract without the knowledge of all principal parties or authorities.” Put simply, an undisclosed agreement means the arrangement is kept hidden from key stakeholders. It might be a pact made strictly between you and your vendor contact, completely bypassed by sales, procurement, or upper management.
Because they violate the core principle of transparency, undisclosed side agreements can trigger severe regulatory penalties and even render an entire deal void. They are a compliance nightmare, yet they happen all the time. A vendor eager to win a contract might offer hidden perks, or a demanding customer might pressure a rep for “special” treatment. For instance, if an official policy restricts the use of a specific product feature, a secret side agreement might grant a customer exclusive access anyway. This creates an unfair competitive advantage. Especially if competitors use the same vendor but are forced to play by the official rules. Naturally, because the legal fallout can be catastrophic, no one willingly admits these agreements exist.
Avoiding them should be simple, right? Unfortunately, it is shockingly easy to slip into one by accident.
These agreements do not always involve under-the-table financial kickbacks. You can find yourself in a legally precarious position simply by getting permission to use a restricted software feature, product, or service. Perhaps you asked nicely during a business meeting, over a phone call, or via email, and the vendor rep said, “Sure, go ahead.” Even though the official contract forbids it, you now have special permission. Because it isn’t formally appended to the master contract, it remains undisclosed to the rest of the company. Maybe even for the vendor.
When that approval drops into your inbox, it is tempting to just celebrate the quick win. Your competition is still bound by the official policy, while you got an exception. But what happens next? The core issue with an undisclosed side agreement is right there in the name: it is undisclosed. The specific representative who sent the email knows about it, but what happens when they leave the company? Will their successor honor a casual email? Furthermore, does anyone else in your own organization know? Have your legal and procurement teams been informed, or is the knowledge sitting entirely with you?
These informal arrangements hold no legal weight. If a dispute arises, an email or verbal promise cannot override a signed contract. Because these secret exceptions are invalid, relying on them exposes your company to massive risk. To protect your organization, eliminate the secrecy. Insist on a formal contract amendment to turn that casual exception into a secure, official part of the agreement. Worse yet, most corporate contracts contain an “Entire Agreement” clause. This clause explicitly states that only the written contract matters, effectively making casual email promises legally unenforceable.
To protect your organization, you must eliminate the secrecy. If a vendor grants you an exception to an official policy, do not just file the email away. Insist on a formal contract amendment. Print the confirmation, route it through legal, and ensure it becomes an official, integrated part of the contract. By eliminating the “undisclosed” element, you turn a compliance liability into a secure business asset.