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Old 07.11.2019, 06:57
LockSmith LockSmith is offline
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Re: Swiss tax identification number

And just in case @CBGeneve 's link ever breaks, it is summarised as:

The TIN or OASI Number for individuals is (depending on your language) [AHV-Versichertennummer; numéro d’assuré AVS; numero d’assicurato AVS]).

It consists of an initial 3-digit country code
(Switzerland = 756), a 9-digit random number which provides a lifelong, unique and anonymous
identification to each person, and a final check digit. For better readability, each block is separated
from the other by a dot. The structure of the OASI Number can be modelled as follows:
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