Signaté made her debut in the French national team in October 2004, in a match in Germany against the Norwegian team. In December 2004 she participated at the 2004 European Women's Handball Championship in Hungary, where the French team placed 11th. In 2004, she also achieved a 4th place representing France at the European Junior Championship in the Czech Republic. In 2005, she participated at the Mediterranean Games in Almería, placing 4th with the French team. She participated at the 2007 World Women's Handball Championship in France, where France finished 5th. She represented France at the 2008 Summer Olympic Games in Beijing, where France finished 5th. In 2009, she won a gold medal at the Mediterranean Games in Italy. She participated at the 2009 World Women's Handball Championship in China, where the French team won the silver medal behind Russia, and Signate was selected into the All-Star team as the best left back of the tournament.