In each notification of change you will be informed separately of the consequences of the change and your right of objection and/or termination. </p> 19 Final provisions <p> a. All changes, amendments and cancellations of contractual agreements must be made in writing, as must the cancellation of the written form requirement, unless these terms and conditions of business provide for the text form. </p> <p> b. Offsetting or a right of retention may only be declared against claims of luckycloud with undisputed or legally established counterclaims. </p> <p>