Specifies a document number that refers to the customer's or vendor's numbering system. You can enter a maximum of ten characters, both numbers and letters.

When you create a sales journal line, you can use this field to record the number that the customer assigned to the order on which this journal line is based. You can then use the number later if, for some reason, you need to search for the posted journal line using the customer's order number.

When you create a purchase journal line, you can use this field to record the vendor invoice, order or credit memo number that the vendor assigned to the purchase document on which this journal line is based. You can then use the number later if, for some reason, you need to search for the posted journal line using the vendor's number for the document.

If you use the feature Navigate to find ledger entries, you can also search using the external document number when navigating on vendor ledger entries.

When the journal line is posted, the external document number will be transferred to the External Document No. field on the posted line.

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