确认有效 meaning in Chinese

efficiency confirmed

The selling of item with the buyer will be decided by me
所售藏品已买方跟贴确认为准.其他方式由本人确认有效
Remarks : the form herein shall come into effect by fax or in duplication
备注：此表传真件或复印件经主办方确认有效。
As your own responsibility make sure that your tavel documents such as passport and visas are in compliance with all local requirements
请贵客自行确认有效旅行证件如护照、签证等，若有影响行程或无法成行，本公司恕不退还己缴之费用。