Canon 875. Whoever administers baptism is to take care that if there is not a sponsor present, there is at least one witness who can prove that the baptism was conferred.

Qui baptismum administrat curet ut, nisi adsit patrinus, habeatur saltem testis quo collatio baptismi probari possit.

Canon 876. To prove that baptism has been conferred, if there is no conflict of interest, it is sufficient to have either one unexceptionable witness or, if the baptism was conferred upon an adult, the sworn testimony of the baptised person.

Ad collatum baptismum comprobandum, si nemini fiat praeiudicium, sufficit declaratio unius testis omni exceptione maioris, aut ipsius baptizati iusiurandum, si ipse in aetate adulta baptismum receperit.

Canon 877. §1 The parish priest of the place in which the baptism was conferred must carefully and without delay record in the register of baptism the names of the baptised, the minister, the parents, the sponsors and, if there were such, the witnesses, and the place and date of baptism. He must also enter the date and place of birth.

§2 In the case of a child of an unmarried mother, the mother’s name is to be entered if her maternity is publicly known or if, either in writing or before two witnesses, she freely asks that this be done. Similarly, the name of the father is to be entered, if his paternity is established either by some public document or by his own declaration in the presence of the parish priest and two witnesses. In all other cases, the name of the baptised person is to be registered, without any indication of the name of the father or of the parents.

§3 In the case of an adopted child, the names of the adopting parents are to be registered and, at least if this is done in the local civil registration, the names of the natural parents in accordance with §§1 and 2 subject however to the rulings of the
Episcopal Conference.

§1. Parochus loci, in quo baptismus celebratur, debet nomina baptizatorum, mentione facta de ministro, parentibus, patrinis necnon, si adsint, testibus, de loco ac die collati baptismi, in baptizatorum libro sedulo et sine ulla mora referre, simul indicatis die et loco nativitatis.

§2. Si de filio agatur e matre non nupta nato, matris nomen inserendum est, si publice de eius maternitate constet aut ipsa sponte sua, scripto vel coram duobus testibus, id petat; item nomen patris inscribendum est, si eius paternitas probatur aliquo publico documento aut ipsius declaratione coram parocho et duobus testibus facta; in ceteris casibus, inscribatur baptizatus, nulla facta de patris aut parentum nomine indicatione

§3. Si de filio adoptivo agitur, inscribantur nomina adoptantium necnon, saltem si ita fiat in actu civili regionis, parentum naturalium ad normam §§1 et 2, attentis Episcoporum conferentiae praescriptis.

Canon 878. If baptism was administered neither by the parish priest nor in his presence, the minister of baptism, whoever that was, must notify the parish priest of the parish in which the baptism was administered, so that he may register the baptism in accordance with can. 877 §1.

Si baptismus neque a parocho neque eo praesente administratus fuerit, minister baptismi, quicumque est, de collato baptismo certiorem facere debet parochum paroeciae in qua baptismus administratus est, ut baptismum adnotet ad normam can. 877, §1.