*在电脑系统,即 Consular Lookout and Support System (CLASS) 里撤销
**按照法规,22 CFR § 41.122(c) Notice of revocation. Unless otherwise instructed by the Department, a consular officer shall, if practicable, notify the alien to whom the visa was issued that the visa was revoked or provisionally revoked. 但实际上有些工作人员在系统里撤销签证的时候,并没有告知当事人。所以存在极低的风险,签证在系统里被默默cancel了,且CO违法操作规定,没有发邮件或者当面告知。
*在签证上盖撤销章
如果是前者,个人无法立刻知晓,只有到了海关才知道。后者是很明显的被盖章了,当场看到。
有些CO也会比较通情达理的告诉你,你的签证我不撤销,你可以回美国等结果。