English to Italian Bus/Financial Business/Commerce (general)

I sincerely think 'guarantee' might be a typo for "guaranteed" and it refers to free, but I don't understand what 'with full title' means anyway. The text I am translating is a share purchase agreement:
"On the terms of this agreement, with effect from Completion, the Sellers shall sell, and the Buyer shall buy, the Sale Shares with full title guarantee free from all Encumbrances and together with all rights that attach (or may in the future attach) to them including, in particular, the right to receive all dividends and distributions declared, made or paid on or after the date of this agreement."