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- Related information: social security obligations
http://www.seg-social.es/Internet_1/Masinformacion/Internacional/index.htm
Competent authority for A1 forms:
Tesorería General de la Seguridad Social [Social Security General Treasury]
(only for A1 forms)
C/ Astros, 5
28007 - Madrid
+34 915 03 80 00 / +34 915 03 83 41