@Metalsmith, please understand that if you send a sales invoice to a consignee, your
Accounts Receivable and income account to which you allocate the non-existent sale will both be wrong. That means your balance sheet and profit & loss statement will also be in error. You will be violating a multitude of accounting principles. You will have trouble defending yourself in any audit. And if the items you sell on consignment are taxable in your jurisdiction, you will be creating false tax records. I urge you strongly not to do this.
Let me give you an analogy. Suppose your company made money from sending tow trucks out onto nearby highways looking for broken-down cars to tow. You would not issue anyone an invoice just because your income-generating asset was out in public where it could be seen by someone potentially needing a tow. Likewise, you should not invoice anyone because your consigned items are out in public where they could be seen by someone potentially needing to buy them.
In the case of the tow truck, you would send an invoice after you towed someone’s car, that is, after the economic activity took place. In the case of a consignment, you should not send the invoice until the economic activity has taken place, that is, after someone has purchased the item from the consignee. In actual fact, most consignment sales and the associated receipts are initiated by the consignee, not the consignor (you).
The fact that your consignment item is at someone else’s location is financially no different than advertising it for sale in a newspaper, magazine, or online. Placing the item with the consignee is a marketing technique, not a financial transaction.