noun
reconfirmation; double check
Used when verifying something again, often in formal or business contexts.
予約の再度確認をお願いします。
Please reconfirm the reservation.
出発前に日程の再度確認をした。
I double-checked the schedule before departure.
確認 is a single confirmation, while 再度確認 explicitly means confirming again.
Compound of 再度 (again) and 確認 (confirmation).