Indeed, the Morcenx station, like those of Dax, Mont-de-Marsan and Tarbes, was the head of the line or terminus of the postal service of the Landes. In fact, the Hôtel des Postes was tenant of the former Maison Séba, a large building located on the south side of the Place de la Liberté, next to the Café Divan which has since become a bakery.
However, the owner had informed the municipality that the lease on the Hôtel des Postes was due to expire on December 31, 1925. The municipal council was procrastinating, especially since the 1929 crisis heralded difficult years for the timber and gem industries. Therefore, there was no question of building at great expense. The post office was simply moved to one of the shops on Avenue Joffre until the post-war period. In Morcenx, as everywhere in France, the country had to be revived.
Finally, the regional PTT management proposed a financial package with state aid that reduced the municipality's contribution to 25%. Construction of the Post Office building began in 1948.
It thus completed the double architectural symmetry desired in 1936 by architect Franck Bonnefous, with a building featuring a rotunda welcoming the public.