Here are some example inputs for different countries in Europe and the USA, with country code included in the postal code and only one comma between name and location:
Germany:
Max Mustermann, DE-10115 Berlin
Austria:
Maria Huber, AT-1010 Vienna
Switzerland:
Peter Meier, CH-8001 Zurich
France:
Jean Dupont, FR-75001 Paris
Italy:
Luca Rossi, IT-00184 Rome
Spain:
Carlos García, ES-28001 Madrid
Netherlands:
Sophie van Dijk, NL-1012 Amsterdam
Belgium:
Thomas Janssens, BE-1000 Brussels
Sweden:
Erik Andersson, SE-111 21 Stockholm
Poland:
Anna Kowalska, PL-00-001 Warsaw
United States:
John Smith, US-10001 New York