Where do I need to apply?

Persons who are not yet entitled to an old-age benefit need to submit their application to the DI office of their canton of residence or to the OASI branch office of their place of residence.

Persons who have reached retirement age need to submit their application to the compensation office which will pay their pension or to the OASI branch office of their place of residence.

The required application form is available here (in German):

Application for DI disablement allowance
Application for an OASI disablement allowance