Prior to playing at the 2005 UEFA Women's Under-19 Championship, Nécib made her senior international debut on 19 February 2005 in a friendly match against Norway. She started the match and was substituted out after 56 minutes as France won 2–0. The victory was France's first-ever against Norway. Despite featuring in only two senior international matches, the other match being the return leg friendly against Norway on 22 February, Nécib, at the age of 18, was included in the team to play at UEFA Women's Euro 2005 by coach Elisabeth Loisel. The midfielder featured in only one match in the competition; the final group stage match against Germany. Nécib played the entire match as the Germans won 3–0. In 2010, Nécib admitted that she took the Germany defeat hard stating "I still have regrets because all we needed was a draw and we conceded three goals in ten minutes". France had kept the Germans at bay for the majority of the match before letting in three goals in the final 20 minutes.