“Concessi (a word much used in Conveyances). In Law it creates a Covenant, as Dedi does a Warranty.” Thomas Blount, Nomo-Lexicon: A Law-Dictionary (1670).
concessi
concessi (k[schwa]n-ses-I). [Latin] Hist. I have granted. • Concessi creates a covenant in a lease for years; it does not warrant title. Concessi often appeared in the phrase demisi, concessi, et ad firmam tradidi (“demised, granted, and let to farm”). Cf. DEDI.