UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                     FORM 15

CERTIFICATION  AND NOTICE OF TERMINATION OF REGISTRATION  UNDER SECTION 12(g) OF
THE SECURITIES  EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER
SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

                                               Commission File Number :333-36901

       MCI Communications Corporation 401(k) Plan for Non-Exempt Employees
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             (Exact name of registrant as specified in its charter)

     1801 Pennsylvania Avenue, N.W., Washington, D.C. 20006, (202) 872-1600
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 (Address, including zip code, and telephone number, including area code,
                  of registrant's principal executive offices)

                 Interests in the MCI Communications Corporation
                      401(k) Plan for Non-Exempt Employees
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            (Title of each class of securities covered by this Form)

           Interests in the MCI Communications Corporation 401(k) Plan
        Interests in the Western Union International, Inc. 401(k) Plan
                      for Collectively Bargained Employees
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         (Titles of all other classes of securities for which a duty to
               file reports under section 13(a) or 15(d) remains)

Please place an X in the box(es) to designate the appropriate rule  provision(s)
relied upon to terminate or suspend the duty to file reports:

Rule 12g-4(a)(1)(i)      [ ]           Rule 12h-3(b)(1)(i)     [X]
Rule 12g-4(a)(1)(ii)     [ ]           Rule 12h-3(b)(1)(ii)    [X]
Rule 12g-4(a)(2)(i)      [ ]           Rule 12h-3(b)(2)(i)     [ ]
Rule 12g-4(a)(2)(ii)     [ ]           Rule 12h-3(b)(2)(ii)    [ ]
                                       Rule 15d-6              [X]

Approximate number of holders of record as of the certification or notice date:
Zero
Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934 , MCI
Communications  Corporation  401(k)  Plan,  as  successor  by  merger to the MCI
Communication  Corporation 401(k) Plan for Non-Exempt Employees, has caused this
certification/notice  to be  signed  on  its  behalf  by  the  undersigned  duly
authorized person.

Date: June 27, 2000                   By:   /s/  Dennis Sickle
      -------------                       --------------------------------------
                                          Dennis Sickle
                                          Senior Vice President, Human Resources
                                          WorldCom, Inc.

Instruction:  This  form is  required  by Rules  12g-4,  12h-3  and 15d-6 of the
General Rules and  Regulations  under the  Securities  Exchange Act of 1934. The
registrant  shall file with the Commission three copies of Form 15, one of which
shall be manually signed.  It may be signed by an officer of the registrant,  by
counsel or by any other duly authorized person. The name and title of the person
signing the form shall be typed or printed under the signature.