acknowledgement stamp

例句：

1. 1.The company issued a new acknowledgment stamp to commemorate the anniversary of its founding.
   公司发行了一枚新的承认书戳记，以纪念其成立周年。
2. 2. The stamp collectors were thrilled to receive this rare acknowledgment stamp from their favorite artist.
   邮票收藏家们对于收到他们最喜欢的艺术家的这枚罕见承认书戳记感到非常高兴。
3. 3. The stamp dealer carefully examined the acknowledgment stamp before deciding whether to sell itor keep it for himself.
   邮票商仔细检查了这枚承认书戳记，然后决定是出售它还是保留给自己。