The Social Security system is probably the closest we have to a national system of identification in the U.S. A woman would mail the marriage certificate, or perhaps nowadays email it, to the Social Security office.

社会保障系统可能是我们在美国拥有的最接近国家身份识别系统的系统。一个女人会邮寄结婚证，或者现在可能通过电子邮件将其发送到社会保障办公室。