In the gamemember

Raids › Sessions

Raid attendance, measured by the addon without anyone writing it down.

In your game: Raids › Sessions

What it does: The addon notices on its own when you enter a raid and notes who is in the group. Each night becomes a session, with the bosses killed and the wipes, and the nights of the same raid in the same week merge into one lockout. At the bottom, Member Attendance gives each person's percentage, split by core.
Who sees it: Everyone sees the sub-tab. Each game records the nights the player was present at, and sessions are only exchanged between officers: the whole guild's attendance stays with them. Only officers see the X that deletes a session and change the penalties.
Where to find it: In the window (J or /gos), Raids tab, Sessions sub-tab. The guild's penalties are in Settings › Raid › Raid Tracker, and each core's in Raids › Cores › Configuration.

In Forever every raid is logged. The session starts when you enter the instance, and also when you log in or reload the interface already inside it.
Whoever is in the group is noted on entering, every 5 minutes, at every change in the group and at the start and end of each boss.
After you leave the instance, the session waits 20 minutes. If you return to the same raid in that time, it continues; if you enter a different raid, the previous one closes right away.
Each lockout (the same raid, of the same core, in the same week) is worth 100 per person. Whoever was not in the group at the first note loses the late-arrival penalty; whoever was not in the last, the early-departure penalty. Untouched, each takes off 10.
The lockout week turns over on Tuesday at 00:00 UTC, which is Monday at 21:00 in Brasília.
Only raids of 20 players or more count toward the percentage. A 10-player raid is logged, but does not count.
A night only counts if at least half of the people who passed through the group are from the guild. If not, the addon warns in chat and attendance does not change.

The No Consumables penalty shows in the settings, but in Forever nobody gets it: the addon does not read flasks or food here.
Cannot find a 10-player raid in the list? The list opens filtered to 20+ players; press All.
Two players can see different numbers: a member only sees the nights they logged themselves, and the penalties live in each officer's own game, without passing from one to another.