Contract change management is what happens when a live agreement changes: the scope moves, the price goes up, the end date shifts, or a party is replaced. The mechanics are ordinary. What makes this worth its own page is that every change makes the existing record wrong the day it is signed, and unlike the original agreement, changes arrive with less ceremony and are far more likely to be filed by whoever received the email. A record that is right about the original and wrong about the change is worse than no record.
Which instrument for which change
An amendment alters terms in the existing agreement. An addendum adds something without altering what is there. An extension moves the end date and nothing else. A novation replaces one party with another, which is a different act because the original party leaves. Choosing the wrong instrument rarely breaks anything, but describing the change wrongly on the record does, because somebody later reads the record rather than the documents.
What has to be updated the day a change is signed
Whatever the change touched, on the record, immediately: the end date if it moved, the value if it changed, the notice period if it was renegotiated, and the obligations if scope changed. Then attach the signed change document to the original. The whole discipline is doing this on the day, because the alternative is a record that is confidently wrong and nobody knows which parts.
Why changes are the most common source of a wrong record
The original agreement had a process around it: somebody negotiated, somebody signed, it felt like an event. A price uplift letter arrives by email and gets read, agreed and filed by one person in five minutes. It is the same legal weight and a fraction of the attention, which is exactly why records drift. Treating a change with the same filing discipline as an original agreement is the fix.
Keep the chain readable
Anybody reading the record should be able to see the original agreement, every change in order, and what the current position is, without reconstructing it. Number the changes, date them, and say in one line what each did. The line matters: an amendment attached with no description means somebody has to read it to find out whether it moved the end date.
Questions people ask about contract change management
What is contract change management?
Handling changes to a live agreement, amendments, addenda, extensions and novations, so that the record reflects the current position rather than the original one.
Which is right, an amendment or an addendum?
An amendment alters existing terms; an addendum adds without altering. If you are changing a price or a date, that is an amendment. If you are adding a new service under existing terms, that is an addendum.
What is a novation?
Replacing one party to a contract with another, with everyone's agreement, so the original party leaves and the new one takes on the obligations. It is different from assigning rights, which does not release the original party.
How often do records go wrong because of changes?
It is the most common cause. Original agreements get filed with ceremony; a price uplift letter arrives by email and gets filed by one person in five minutes.