What contract and cancellation periods does billwerk offer? Robert Ohlig October 24, 2017 13:07 Updated Follow In every plan from S to L there is a monthly contract period with a monthly payment and a monthly cancellation period. If you would like to have a longer period, please feel free to contact us by mail email@example.com. Related articles Video tutorials How do my customers receive their invoices? What does billwerk cost? Comments 0 comments Please sign in to leave a comment.