Presentation of credentials of first ambassador (envoy) of Spain: 1519, Information provided by Spain.
The chargé d'affaires of the Polish Legation in Madrid (Jerzy Tomaszewski) informed the Spanish Ministry of Foreign Affairs about his nomination and attached introductory letters (original dated 1919/7/29, signed by the Prime Minister and Minister of Foreign Affairs of the Republic of Poland Ignacy Jan Paderewski): 11/9/1919, Information provided by Poland.
A note from the Minister of Foreign Affairs of Spain (Salvador Bermúdez de Castro O'Lawor) to J. Tomaszewski, confirming receipt of his letter, with introductory letters attached. This meant consent to the establishment of a Polish legation in Madrid and thus the establishment of diplomatic relations through the accreditation of the representative of the Republic of Poland: 17/9/1919, Information provided by Poland.
The decree of the King of Spain (Alfonso XIII) with the nomination of the representative of Spain in Poland (Fernando Gomez Contreras) as chargé d'affaires in Warsaw: 13/11/1919, Information provided by Poland.
The Spanish envoy (Francisco Gutiérres de Agüera) presented his credentials to the Chief of State (Józef Piłsudski) in Warsaw: 10/2/1920, Information provided by Poland.
The Polish envoy (Władysław Skrzyński) presented his credentials to the King of Spain (Alfonso XIII) in Madrid: 25/3/1920, Information provided by Poland.
A note from the Polish ambassador in France (Stanisław Skrzeszewski) to the Prime Minister of the Spanish government in exile in Paris (José Giral) with information about the recognition of these authorities as the official political representation of Spain and the decision to establish diplomatic relations: 10/4/1946, Information provided by Poland.