Most or all of the Italian birth, marriage and death records on the Antenati website take the form of the registrar telling a story about what happened in his office, since he cannot attest to something that happened elsewhere if he wasn’t present.
It is important to understand how to record and share valuable information from death records. Two dudes strolled into the joint and declared that so-and-so died. These guys are described by name, sometimes with his father’s given names to distinguish him from another in the same town; age, occupation and his relationship to the decedent, often “vicino e conoscente della defunta” (neighbor and he knows the deceased female) or “vicino e conoscente del defunto” (neighbor and he knows the deceased male). Sometimes there are more precise indications, such as paternal grandfather of the deceased, which, with the declarant’s father, traces the line back to the decedent’s great-grandfather.
In RootsMagic, you can add this event to the declarant, as Miscellaneous. You can then add it to FamilySearch Family Tree as Miscellaneous. Remember that if the death happened on the 18th of the month and the declaration was made on the 19th, you report the death as happening on the 18th on the decedent’s record, and the declaration date as the 19th on the declarant’s record. The place of the event is the name of the comune (town or city) and the place details is “Casa Comunale” (Town or city hall). The description of the event is, for example, “He reported the death of Teresa Serraino.” The source is the death record, of course. Then add a note if the relationship provides a justification to connect the declarant to the decedent. In this case, it provides a justification to merge two Nicola Mare with different wives because the description establishes that they are the same man with two consecutive wives, and that he is a common ancestor to the descendants of both wives:
The death record for Teresa Serraino (Castelluccia 1832 number 18) identifies one declarant as Giambattista Mare del fú Nicola, age 40 years, gualano, domiciled in the said comune, uncle of the deceased. This makes sense if Giambattista Mare is a brother or half-brother of the decedent’s mother, Sofia Mare, both of whom have a father named Nicola. Sofia Mare is a daughter of Nicola Mare and Isabella Maucione, while Giambattista Mare is a son of Nicola Mare and Sofia Tancredi. Sofia Tancredi died in 1794 and Sofia Mare was born in 1797, so it appears that Giambattista Mare is a half-brother of Sofia Mare.
The event like this, even if it does not establish a connection, establishes that the declarant was in the town hall and not in America or Heaven.