noun
address (to send to); destination address
Refers to the address where something is to be sent or delivered, often used in forms, shipping, or correspondence contexts.
申込書に差し出し先を記入してください。
Please fill in the destination address on the application form.
荷物の差し出し先を間違えないように確認した。
I checked to make sure I didn't get the package's delivery address wrong.
Compound of 差し出し (sashidashi, 'sending') + 先 (saki, 'destination'). The exact historical derivation is uncertain, but the meaning is transparent from its components.