libellatici
(Latin: labi, lapsus, to slip)
Term applied in the third century to Christians who relapsed into heathenism by sacrificing to the heathen gods or by other external acts of apostasy. The lapsi were divided into three classes:
sacrificati, those who had actually offered a sacrifice to idols
thurificati, those who had burnt incense on the altar of the gods
libellatici, those who had drawn up or had caused to be drawn up certificates (libelli, several of which are still preserved) stating that they had offered sacrifice without, however, having actually done so.
After the edict of Decius (250-251) the lapsi who had obeyed the decrees out of weakness wished to attend Christian worship again. Pope Cornelius and Saint Cyprian of Carthage, who wrote a treatise entitled “De Lapsi,” favored their return to the Church, and it was agreed in the synods held in 251 that they should be encouraged to repent and should be readmitted after performing certain public penance. This leniency met with opposition from Novatian, who claimed to be enforcing strict discipline, and finally formed a schismatic community. A new class of lapsi, called traditores, consisting mostly of clerics who yielded up the sacred books to the authorities, appeared during the persecution of Diocletian and caused many disputes, resulting ultimately in the Donatist schism. Canons for the treatment of the lapsi were drawn up by several synods, e.g., those of Elvira (306), Arles (314), and Ancyra (314), and the General Council of Nice. Libelli pacis were certificates of indulgence addressed to a bishop by confessors or martyrs petitioning that their merits be applied to remit the temporal punishment incurred by the lapsed Christians, who were known as libellatici (Latin: bearers of certificates).
Fuente: New Catholic Dictionary
Libellatici
is the name of that class of the lapsed who received from the heathen magistrate a written certificate (libellue) as a warrant for their security; either testifying that they were not Christians, or containing a dispensation from the necessity of sacrificing to the gods in confirmation of their adherence to heathenism. Another class of the lapsed were the sacrificati that is, those who had offered sacrifice to the heathen gods in testimony of their renunciation of the faith; manother the traditores, because they had delivered up into the hands of the heathen either copies of the sacred writings, baptismal registers, or any other property of the Church. See Farrar, Eccles. Dict. s.v.; Schaff, Ch. Hist. 1 (see Index); Mosheim, Commentary (see Index). SEE LAPSED.