A Partnerschaftserklärung (partnership declaration) is a document. With it, you confirm that you live in a partnership with another person.
Sometimes an authority requires this document. For example, when you submit an application and need to show that you live together.
You usually receive the form from the authority where you are submitting an application. For example, from the Wohnungsamt (Housing Office) or Jobcenter. You can often also download it online from the authority’s website. Here you can find the form for the Partnerschaftserklärung (partnership declaration) for the WBS application.
The partnership declaration is a form with fields for personal information. Both partners enter their names and addresses and sign the document.