"To sign the declaration" means to officially put your name on a document, usually a written statement or agreement, to show your support or approval of its contents. Full definition
In some instances, the store will make the person accused of theft sign a declaration stating that he or she will not return to the store in the future. (vancouvercriminallaw.com)
They have to sign a declaration saying that you did do 3,000 hours of substantive law - related work. (lawyerist.com)
One of the most common mistakes is not signing the declaration form. (moneysavingexpert.com)