No, SIPSI does not allow you to complete this formality because it is not necessary to make a declaration to the French Labor Inspectorate to post posted staff outside of France. On the other hand, we advise you to obtain information concerning the required procedures applicable in the host country, on the one hand (contact the competent authorities) and, on the other hand, from your Social Security agency for maintaining his affiliation with French Social Security (http://www.cleiss.fr/reglements/a1.html).