Помогите пожалуйста gen.

[Rak]

State of Maryland, Montgomery County, Sct.

что такое Sct.?

[askandy]

есть такой вариант, но без контекста трудно сказать насколько подходящий

S.Ct. is an abbreviation for Supreme Court. S.Ct. indicates the writer is citing a Supreme Court case.

[askandy]

таки Гугль знает многое

вот ответ на ваш вопрос:

Over the past several months, I have received inquiries from a couple of your offices regarding the meaning of the initials "sct" appearing at the top of the formerly-used form of marriage application/license/certificate of marriage. A copy of the old form is enclosed. Apparently, persons in interest needing a foreign language translation of their marriage certificate have inquired about the meaning of the abbreviation.

I have determined that "sct" stands for "scilicet," although it is an improper abbreviation. Knowing that some official documents, such as wills, use to commence with the formal greeting: "Know All Ye Men By These Presents" and recollecting from my high school Latin studies that "scire" means "to know,"I did a bit of checking in Black's Law Dictionary, 7th ed., under "scire" and variations thereof and found the following:

scilicet (sil-a-set or -sit). [fk. Latin scire licet "that you may know"] That is to say; namely; . . . .
Abbr. sc.; scil. ; (erroneously) ss.

Black's Law Dictionary, 7th ed., p. 1347. Now it is more common to see "to wit," which also means "That is to say; namely." See Black's Law Dictionary, 7th ed., p. 1498.

http://taxbiz.blogspot.com/2006_06_01_archive.html

[askandy]

и еще

Sct., SS., St.
From “scire licet,” Latin for as one may know. Synonymous with “to wit.” Appears at the heading of court documents

http://arcourts.ualr.edu/glossary.htm