楼主你好
上面是不是说:The J1 exchange visitor must sign and date the exchange visitor certification at the bottom of page1 of each DS2019 before sending it to the spouse and /or children.
所以是J1签没错。
原则上是j-1自己签,但是你随便找个人签上J-1的名字就可以。 https://bbs.gter.net/thread-267612-1-1.html
祝好运