There's a possibility your 〇〇 could be taken at customs.
ーThere is a chance your 〇〇 could be seized.
「〇〇が没収されるかもしれない」
to be seize で「差し押えられる・押収される」
ーThere's a possibility your 〇〇 could be taken at customs.
「〇〇が税関で没収されるかもしれない」
to be taken で「取られる」
例:
There is a chance your 〇〇 could be seized. You will need to decide for yourself if you want to buy it/them or not.
「〇〇が没収されるかもしれません。購入するかどうかはご自身で決断ください」
ご参考まで!