The place where they accept paperwork and attach stuff to it is reception. Hand them your forms, and they'll be covered with sticky notes and paperclips before you know it.

受付 is where things officially get received, checked in, or processed at a business, institution, or event. It can refer to the reception desk itself, the receptionist behind it, or even the procedures that get handled there, as in 受付番号 (application number, reception number) or 受付をすませる (finish check-in or registration).

Note that it can also be written as 受け付け, since it originally comes from combining 受ける (to receive something) and 付ける (to attach something).

Since this word is a combination of the verbs 受ける and 付ける, the reading comes from them too: うけつけ.