This is the 15293rd most frequent Russian word.
поставке
"Delivery" or "supply."
The word 'поставке' here modifies 'подтверждения', indicating the supply shipment being discussed.
Доставка осуществляется в течение двух дней после подтверждения поставки.
The delivery is made within two days after confirmation of the supply.
The word 'поставке' is used to refer to the supply shipment scheduled.
Мы договорились о новой поставке оборудования на следующую неделю.
We agreed on a new supply of equipment for next week.
The word 'поставке' refers to supplying items generically, as the topic under discussion.