Swiss Post offers a complete guide on how to send mail from letters to packages. There is even a helpful virtual counter. You can also ask questions at the Swisspost Customer Service line that has an English-speaking service from Monday to Friday, 07:00 to 19:00 and Saturday 08:00 to 13:00 at 0848 888 888.
Post can be forwarded to a new Swiss address for a period of one year. This service can be requested at the local post office, or it can be arranged online. Contact Swisspost at least three working days before the move. Complete info is available on their page for forwarding mail.
Switzerland uses four-digit numeric post codes, sorted by geographical location (from west to east). These do not follow political divisions (cantons, districts), but routing allocation like railways and post car routes. The postal code of big cities finish with 00, and it is not allocated if in the region there isn't a big center.
There are nine postal districts. Each district is subdivided into postal areas. Each area contains a maximum of one hundred units. The postal codes of the Zurich region are made up as follows: 8xxx - Region Zurich
For example, a post code for Zollbruck could be 3436 because
Example post office address
Jan Schmidt [person's name]
Tastentanzenstrasse 5/16 [street name + building-number/apartment-number]
8034 Zurich [postal code + city (Zurich)]
SWITZERLAND [country name]
If a letter has two dots over it, you may type an e after the letter instead of the dots.
Canton abbreviation may be needed if the name of city/town/village is not unique. That is "ZH" for Zurich.
Additional services like hand delivery, expedited service, etc. are available at additional costs. Stamps can be purchased at post office or online.