This requires three business relationships. With a professional share register that is connected to the national settlement system. With an issuing bank for the issue (“issuance”) of the shares into the banks’ settlement system. And with the provider of the national settlement system, for example SIX SIS in Switzerland or Clearstream and Euroclear in the EU.
Furthermore, the company statutes must be adapted. The model articles of association can be downloaded here (link to model articles of association).