The purchase order flow in Business Central moves a purchase from an open document to a posted one. This guide explains open versus posted documents, the blanket order, and when to use a purchase order instead of a purchase invoice.
Understanding the purchase order flow in Business Central makes purchasing far less confusing. In fact, it closely mirrors the sales side, so the same core ideas apply. So once you grasp how documents move from open to posted, the whole process clicks into place. In this guide, we walk through each step, explain the key documents, and show when to reach for each one.
If you have not yet read our guide on the sales document flow, it is worth a look first. Because the two flows share the same logic, that background makes this one even easier to follow.
One more reason this matters is consistency. Because purchasing and sales share the same structure, your team learns one pattern and then reuses it everywhere. So training gets easier, and mistakes become rarer right across the board.
Open and Posted Documents in the Purchase Order Flow
Everything rests on one distinction. First, there is the open document. While a document stays open, it has not yet affected the system. So the general ledger entries, or GL entries, remain untouched. As a result, you can still change or remove the document freely.
Then comes the posted document. Once you post, the action affects the system for good. Technically, you can still delete the record, yet the GL entries stay in place. So to truly reverse a posted document, you must create other documents that undo the change. In short, posting is a commitment.
This rule matters across the whole flow. Because open documents are safe to edit, you do your preparation there. Then, when everything looks right, you post. So the open area is your workspace, and the posted area is your permanent record.
It also protects your accounts. Since posting writes to the GL entries, the system guards those records carefully. So you cannot quietly erase history. As a result, every number you report later can be trusted.
How the Purchase Order Flow Works
The journey starts on the left and moves to the right. First, you go to a vendor and ask for a quote on certain goods or materials. Then, from that quote, you generate either a purchase order or a purchase invoice.
So the early steps feel very familiar. In fact, the terms match the sales document flow almost exactly. As a result, anyone who knows the sales side already understands most of the purchase side. Meanwhile, the document names simply switch from sales to purchase.
From the quote, the path then splits in two. So you decide how the goods and the money should move next. Either way, the vendor relationship stays right at the centre of the purchase order flow.
It also helps to picture the whole purchase order flow as a single road. You start with a request, you make one key choice in the middle, and you finish with a posted record. So every purchase, large or small, follows the same clear and repeatable path.
The Blanket Order: A Frame for Many Orders
The purchase side adds one extra document: the blanket order. Think of it as a frame for multiple orders. So from a single blanket order, you can generate several purchase orders over time.
This helps when you buy the same goods repeatedly. For example, you might agree on volumes and prices once, then release orders as you need them. As a result, you save time and keep your agreements consistent. So the blanket order is a handy planning tool for ongoing purchasing.
Of course, the blanket order is optional. So if you only buy something once, a single order is fine. However, for repeat purchases, the frame saves real effort over the course of a year.
Purchase Order vs Purchase Invoice
Here is the key choice in the flow. A purchase order lets you receive goods without touching the financial side yet. So you can take items into inventory before any invoice is posted. In other words, receiving and invoicing become two separate actions.
The purchase invoice works differently. Instead, it offers a single action that produces two effects at once. So when you post a purchase invoice, the system assumes every listed item has arrived. Then it records both the receipt and the invoice together.
So which one should you pick? In short, choose the order when goods and invoices arrive at different times. Meanwhile, choose the invoice when everything arrives together and you simply want fewer steps.
Two Actions From a Purchase Order
Those two separate actions give you flexibility. For example, goods may arrive before the supplier’s invoice does. So you receive the stock now and post the invoice later, once it appears. As a result, your inventory stays accurate, even when the paperwork lags behind. Meanwhile, your finance records wait until the invoice is truly ready.
Posted Receipts and Posted Invoices
Each posting creates a permanent record. So a posted purchase receipt affects your inventory, while a posted purchase invoice affects your finances. In short, each document touches a different part of the system.
This split is useful to remember. Because receipts and invoices post separately, you always know what has changed and where. As a result, you can trace stock movements and financial entries back to the right document. So nothing is ever a mystery.
This separation also supports clean reporting. Because inventory and finance update independently, each team sees exactly what it needs. So the warehouse tracks stock, while accounting tracks money, all from the same flow.
Reversing a Posted Document
Sometimes you need to undo a posted document. However, you cannot simply delete it. Because the GL entries are already in place, deleting the record leaves those entries behind.
Instead, you create a corrective document that reverses the change through its own posting. So the original entry stays visible, and a new entry balances it out. As a result, your audit trail remains complete and honest. We cover these reversing documents in the next video, so be sure to follow along there.
This approach may feel strict at first. However, it is exactly what keeps Business Central reliable. So instead of hidden edits, every correction stays visible and deliberate.
Wrapping Up: Mastering the Purchase Order Flow
The purchase order flow is simpler than it first appears. First, you prepare your documents in the open area. Then, you choose a purchase order for flexibility, or a purchase invoice for speed. Finally, you post, and the system records the result for good.
Once you know this rhythm, every purchase becomes predictable. So you receive goods with confidence and keep your finances clean. With the purchase order flow clear in your mind, the rest of Business Central feels much more approachable.
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