Maryland Commercial Law Section 14-3402
§ 14-3402.
CAUTION: READ FULL TEXT OF SECTION FOR SPECIAL NOTE
** SPECIAL NOTE: EFFECTIVE - JANUARY 1, 2006 - CHAPTER 521 - 2005 **
  (a)   Except as otherwise provided in this subtitle, a person may not:
    (1)   Publicly post or display an individual's Social Security number;
    (2)   Print an individual's Social Security number on a card required for the individual to access products or services provided by the person;
    (3)   Require an individual to transmit the individual's Social Security number over the Internet unless the connection is secure or the individual's Social Security number is encrypted;
    (4)   Initiate the transmission of an individual's Social Security number over the Internet unless the connection is secure or the Social Security number is encrypted;
    (5)   Require an individual to use the individual's Social Security number to access an Internet website, unless a password, unique personal identification number, or other authentication device is also required to access the website; or
    (6)   Unless required by State or federal law:
      (i)   Print an individual's Social Security number on any material that is mailed to the individual;
      (ii)   Include an individual's Social Security number in any material that is electronically transmitted to the individual, unless the connection is secure or the individual's Social Security number is encrypted; or
      (iii)   Include an individual's Social Security number in any material that is transmitted by facsimile to the individual.
  (b)   This section does not apply to:
    (1)   The collection, release, or use of an individual's Social Security number as required by State or federal law;
    (2)   The inclusion of an individual's Social Security number in an application, form, or document sent by mail, electronically transmitted, or transmitted by facsimile:
      (i)   As part of an application or enrollment process;
      (ii)   To establish, amend, or terminate an account, contract, or policy; or
      (iii)   To confirm the accuracy of the individual's Social Security number;
    (3)   The use of an individual's Social Security number for internal verification or administrative purposes; or
    (4)   An interactive computer service provider's or a telecommunications provider's transmission or routing of, or intermediate temporary storage or caching of, an individual's Social Security number.
  (c)   This section does not impose a duty on an interactive computer service provider or a telecommunications provider actively to monitor its service or affirmatively to seek evidence of the transmission of Social Security numbers on its service.