USPS Mail Delivery Paper Checks Follow Viewpost Support Center Enterprise Payments On Viewpost Vendor Inquiries Please click HERE or on the attachment below for updates to USPS standard delivery timelines. USPS-Fact-Sheet_FCM-Service-Standard-Change.pdf (200 KB) Elizabeth M Updated: November 08, 2021 15:46 Created: November 08, 2021 15:46