English to French Law/Patents Law: Contract(s)

"The property in the Products shall not pass to Purchaser until Supplier has received full payment of all Products, including all claims of Supplier deriving from contracts of a later date and from future contracts. This shall also apply if individual or all of Supplier's claims have been included in a current account and the balance has been struck and accepted."

problème de compréhension au niveau de la dernière phrase : comment la comprenez-vous ? ("claims" ici signifie "demandes de remboursement" ? si c'est le cas, comment ont-elles été "included in a current account" et "struck" ici a quel sens ?)

Merci beaucoup par avance !