commendātĭcĭus or -tĭus, a, um, adj. [commendatio],
serving for commendation , commendatory (very rare): litterae, letters of recommendation or introduction , Cic. Fam. 5, 5, 1; cf. Dig. 41, 1, 65; so, tabellae, Cic. Verr. 2, 4, 66, § 148; and absol. , commendaticiae, ārum, f., Aug. in Macr. S. 2, 4, 15.
commendātīcius (not -tītius), adj.commen do, commendatory : litterae, letters of recommen dation,...
An Elementary Latin Dictionary