After my copies of the Animelo Summer Live 2019 blu-rays were returned to CD Japan I asked if I could receive a refund or credit rather than get them shipped to me as I had bought another set of the blu-rays in the meantime.
CD Japan replied yesterday that they could do either of a credit or a refund so I will proceed with a credit and buy a few other new titles.
Very good service from CD Japan to offer both a refund or credit for goods that were returned by Japan Post.