Find the notice period in each contract. It varies, and some are short.
How it flows
Put the due date next to each change. Sort the register by due date, not by reference.
Send a short notice early. A rough notice now is better than a perfect one too late.
Keep proof of sending. A sent email with the date is your evidence.
Stop missing deadlines by setting a due date the moment a change is logged and by checking the register every day for dates that are close.
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