ご確認のほど、よろしくお願いいたします。
Please kindly confirm at your convenience.
✦ AI pragmatic read · suggests Teineigo
A very polite business expression used in written requests, showing deference and humility; typically employed by a subordinate or colleague when asking a superior or client to confirm something.
A starting point, not the final word — open the entry to add your own note if you'd explain it differently.