This is the 17072nd most frequent Russian word.
справка
Certificate or reference.
Here, 'справка' means 'note' or 'certificate' provided by an official entity, indicating some statement of proof.
Мне нужна справка от врача для работы.
I need a doctor's note for work.
In this context, 'справка' refers to an official document that provides detailed information about income for tax purposes.
Специалист по налогам попросил справку о доходах.
The tax specialist asked for an income report.
In this example, 'справка' denotes an official record or statement regarding library book transactions.