Program Info 77 S Washington St, Seattle, WA 98104206-474-1000Open Monday-Friday, 9am-4 pmClosed holidays Located in Pioneer Square, our Client Services Office (CSO) provides free mail services for people experiencing homelessness or low incomes. A mailing address provides stability and the opportunity to apply for benefits, seek employment, access resources, and exercise the right to vote. … Continue reading Compass Center Client Services Office