Done in absentia.

Plural: absentees

One that is absent or not in residence.
One not present; worker absent from work

Plural: absenteeisms

Habitual absence from work.
Employees staying away from work when they should be at work. Absenteeism causes problems for employers because it disrupts production and because it costs the business money if it has to employ someone else to do the work but also pay sickness or other benefit to the absentee worker. High rates of absenteeism may indicate that workers are finding the job particularly stressful or injurious to health. It may also indicate that workers find the job very boring and lack motivation.

Plural: absenteeships