Florence T~ and Arline T~ have both filed for widow's benefits on the account of the
                  deceased wage earner, Carl B. T~ . You have requested our opinion concerning the legal
                  status of the parties and their entitlement to benefits.
               
               A review of the claims file reveals the following pertinent facts. Florence T~ married
                  Carl T~ on May 12, 1934 in New Hampshire. Carl T~ secured a Mexican divorce from Florence
                  on March 30, 1955. Both parties were residents of Massachusetts at the time of the
                  divorce. The decree states that Florence was notified of the complaint by summons,
                  but did not appear in the proceedings or answer the complaint. The decree did not
                  provide for any property settlement. Carl T~ subsequently married Arline T~ on November
                  12, 1955 in Massachusetts. No children were born of this marriage. The wage earner
                  died July 25, 1983 while domiciled in Massachusetts. Arline filed an application for
                  the lump sum death benefit on August 5, 1983, and the lump sum was subsequently paid
                  to her.
               
               Florence T~ filed for widow's benefits on the deceased's account on August 19, 1983,
                  alleging that she had not participated in the Mexican divorce obtained by the wage
                  earner, had not received any money or property as a result of the divorce, and had
                  never remarried after the divorce. In addition, she stated that she had consulted
                  an attorney after receiving a copy of the final decree and was told that the divorce
                  was invalid. The attorney advised her to wait three years and then file for divorce
                  on the grounds of desertion. Florence stated that she never took any further action
                  because she did not have enough money to proceed with the divorce. The district office,
                  having concluded that the Mexican divorce was invalid, issued an award certificate
                  on November 18, 1983 finding that Florence was entitled to benefits as the wage earner's
                  widow. Meanwhile, Arline T~ had also filed an application for widow's benefits on
                  October 6, 1983. A determination on her claim has been postponed pending resolution
                  of the legal status of the parties.
               
               As you are aware, the Mexican divorce obtained by the wage earner would not be recognized
                  as valid by the courts of Massachusetts since neither party to the divorce was actually
                  domiciled in Mexico at the time of the divorce. See, e.g., our opinion re Edward N.
                  S~, October 28, 1983. The issue that must be resolved, therefore, is whether Florence
                  T~ would be estopped from denying the validity of the divorce. If Florence would be
                  estopped, then she could not be found to be the wage earner's widow. She would, however,
                  be entitled to surviving divorced wife's benefits pursuant to POMS §GN
                  
                  00305.480, and Arline T~ could then be found to be entitled to widow's benefits as the "good
                  faith" wife of the wage earner under §216(h)(1)(B) of the Act. If, on the other hand,
                  Florence T~ would not be estopped from denying the validity of the divorce, then she
                  would be entitled to widow's benefits as the legal widow of the wage earner. In that
                  event, Arline T~ would not be entitled to any benefits.
               
               Our review of the relevant case law reveals that Massachusetts courts, in cases where
                  the doctrine of estoppel has been applied, have required more than the mere passage
                  of time on which to base the estoppel. Thus, the courts have ruled that the spouse
                  attacking the divorce decree as invalid, in order to be held estopped, must have actively
                  participated in obtaining the divorce or must have received valuable consideration
                  in return for acquiescing in the divorce. McCarthy  v. McCarthy, 361 Mass. 359, 280 N.E.2d 151 (1972); Dennis  v. Dennis, 337 Mass. 1, 147 N.E.2d 828 (1958); see also Poor  v. Poor, 381 Mass. 392, 409 N.E.2d 758 (1980).
               
               In a recent opinion we concluded that a claimant for widow's benefits who had participated
                  in obtaining an invalid Mexican divorce by her appearance through counsel would, under
                  Massachusetts law, be estopped from challenging the validity of the divorce. Opinion
                  re Frank E. C~ , January 25, 1984. In this case, however, Florence T~ did not appear
                  in the divorce proceedings or answer the complaint. Furthermore, she did not receive
                  any property or other valuable consideration as a result of the divorce, and she did
                  not remarry in reliance upon the divorce. If the doctrine of estoppel is to be applied
                  at all to the facts of this case, it would therefore have to be based solely on the
                  fact that Florence did not challenge the divorce decree from the time it was issued
                  in 1955 until the wage earner's death in 1983.
               
               We are not aware of any Massachusetts case applying the doctrine of estoppel by delay
                  (laches) to a factual situation like the present one. As stated previously, the courts
                  of Massachusetts have required that estoppel be based on more than the mere passage
                  of time. Consequently, it is our opinion based on current Massachusetts precedents
                  that Florence T~ would not be estopped to deny the validity of the 1955 divorce. 1_/
                  Florence would therefore be recognized as the wage earner's legal widow and would
                  be entitled to widow's benefits.
               
               1_/ See our opinion re Russell B~, February 18, 1964 (concluding that The first wife
                  of a wage earner who had obtained an invalid Mexican divorce in 1941, had remarried
                  in 1949, and had died in 1959 was the legal widow of the wage earner for purposes
                  of entitlement to benefits).