Debt extract (Betreibungsauszug).
Official 5-year debt-collection record. The single most important document on every Swiss rental application.
The Betreibungsauszug (debt extract) is an official certificate from the debt enforcement office (Betreibungsamt) of the place where you live. It lists every debt-collection proceeding, seizure, and bankruptcy registered against you in the last five years. Swiss landlords ask for it on almost every rental application. A clean extract is often the basic requirement; an extract with open items can end an application.
Freshness matters: many landlords accept only extracts less than 90 days old. On aptari you upload it into your Tenant Passport; once it is older than 90 days, aptari marks your Passport as expired until you upload a fresh one.
Where to order: from your municipality's debt-collection office, online or in person. Cost: CHF 17, or CHF 18 if it is sent to you by post or electronically, the same in every canton because federal law sets the fee (GebV SchKG art. 12a). Ordering services that do it for you charge more. Major cities: Stadt Zürich (betreibungsamt.stadt-zuerich.ch), Stadt Bern, Stadt Genf, Stadt Basel.
After moving: each debt enforcement office reports only on its own district. If you moved recently, order an extract at your new address and, if the landlord asks for it, one from the office of your previous address too.
General information, not legal advice.