If the agreement is consisiting of termination clause then you need the serve a notice/letter tp other party, which shows your intention to terminated the agreement. The period of notice varies as per the term mutually agreed in the agreement. If such the agreement is not consisiting of termination clause then you have to mention the date when you wanted to end the agreement. (min. 15 days prior to terminate max depends upon the terms and nature of the agreement). The cancellation of agreement either by notice/letter or by separate addendum to main contracts depends what you mutually agreed with your partner as well as pupose of the agreement.
Justa Causa Legal Associates, Jalgaon
0-9923552956