Please be aware / please note / please understand (that ...) — a polite phrase used in notices and formal communication to ask the reader to accept or be aware of a condition.
商品の色が写真と多少異なる場合があります。あらかじめご了承ください。
Please note that the color of the product may differ slightly from the photo.
ご注文後のキャンセルは受け付けられませんのでご了承ください。
Please understand that cancellations after ordering cannot be accepted.
イベントは天候により中止になる場合があります。ご了承ください。
Please be aware that the event may be cancelled due to weather.