How to select a vendor and enter the invoice number In this guide: Connect a purchase to the supplier and keep the supplier's invoice number with your record. Vendor selection A vendor is optional for a fully paid purchase. Select one when you want to review purchases by supplier, keep an open or consignment purchase, or track how much your business owes that supplier. Steps Start a new purchase. In the Vendor area, search for and select the supplier. If the vendor does not exist, use the new-vendor option, enter its details, save it, and select it. Enter the supplier's invoice or bill number in Reference Number. Add the received products and continue the purchase. When a vendor is required RepairNest POS requires a vendor for an open or consignment purchase because the remaining balance must belong to a supplier account. Tip Enter the number exactly as it appears on the vendor invoice. This makes the purchase easier to search and helps prevent duplicate entry.