to confirm, certify something to another, or to satisfy that person (see Molina)
Alonso de Molina:
yoliuhtlamachtia. nite. (pret. oniteyoliuhtlamachti.) certeficar de algo a otro o satisfazerle. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 40r. col. 1. Thanks to Joe Campbell for providing the transcription.