Banking

Yes, and it is entirely legal. The obstacle is compliance rather than law: the bank must be satisfied on identity, source of wealth and source of funds, and every bank sets its own acceptance policy by nationality, residence and expected volumes. The same applicant is often refused by one bank and accepted by another.

Certified identity documents and proof of address, plus documentary evidence of where the money came from: employment, business sale, inheritance or investment returns, traced far enough back to be verifiable. A corporate applicant adds register extracts, articles and beneficial-owner declarations.

Not from tax authorities. Under automatic exchange of information Switzerland reports account data on foreign tax residents to their home authorities each year. Confidentiality towards private parties remains, and disclosure to Swiss authorities still requires a legal basis.