Definition
An invoice book is a business record in which invoices are copied or recorded, serving as a merchant's or trader's register of goods sold, shipped, or consigned, together with their quantities, descriptions, and prices. Historically, before electronic recordkeeping, merchants maintained invoice books as primary accounting documents evidencing commercial transactions.
The related phrase INVOICE PRICE, as used in commercial and mercantile law, means the prime cost of goods — that is, the actual cost to the seller at the point of acquisition or manufacture, before any markup, freight, or handling charges are added.
---
Common Language
Modern common usage (Wiktionary): An invoice is a document issued by a seller to a buyer listing goods or services provided and the amounts owed. A book of invoices is understood colloquially as any collection or file of such records.
Historical common usage (Webster's 1913): An invoice is defined as a written account of the particulars of merchandise shipped or sent to a purchaser, consignee, or factor, with the value or prices and charges annexed.
The legal meaning of "invoice book" adds a layer that common usage does not: in mercantile and evidentiary law, the invoice book was a recognized class of business record with specific significance as documentary evidence in commercial disputes. Its legal relevance was not merely as a file of papers but as a maintained register whose regularity of keeping bore on its trustworthiness as proof of the terms and prices of a transaction.
---
Why It Matters in Research
This term is primarily encountered in historical commercial law sources — particularly cases and treatises from the eighteenth and nineteenth centuries dealing with mercantile transactions, consignment disputes, bills of lading, and commercial accounting records. Researchers will find it most frequently in:
EVIDENTIARY CONTEXTS: Courts in the early American and English commercial law tradition treated invoice books as a species of business entry, admissible under the shop books or business records doctrine to prove the price and terms of a transaction. The distinction between invoice price (prime cost) and selling price was legally material in disputes over freight, insurance, breach of contract, and damages calculations.
INVOICE PRICE AS A TERM OF ART: The Black's notation that invoice price means "prime cost" — citing 7 Johns. 343 — is significant for researchers reading historical commercial cases. Do not assume "invoice price" in an older case means the retail or contract price. It specifically indicated the base acquisition cost, which mattered in insurance valuations, cargo disputes, and calculations of profits and losses in consignment arrangements.
ARCHIVAL AND RECORD-KEEPING LAW: In historical mercantile practice, the regularity and completeness of an invoice book could determine whether it was admissible as evidence. Courts scrutinized whether entries were made contemporaneously and in the ordinary course of business. Researchers reading nineteenth-century commercial litigation should watch for arguments turning on the authenticity and regularity of a merchant's invoice book as a record.
The term is essentially obsolete in modern practice. Electronic invoicing, accounting software, and digital records have replaced the physical invoice book entirely. Modern equivalents fall under business records exceptions to hearsay (Federal Rule of Evidence 803(6) and state analogs), but the specific term "invoice book" will not appear in contemporary statutory or case law.
---
Historical Dictionary Support
Black's Law Dictionary provides a terse but precise entry: an invoice book is a book in which invoices are copied, and invoice price means the prime cost of goods, citing an early New York case. This brevity reflects the term's status as a well-understood commercial practice term that required little elaboration for the dictionary's contemporary audience.
Historical legal dictionaries of the nineteenth century treated the invoice book as part of the broader category of merchants' books of account, a subject with its own evidentiary doctrine. The slim treatment in Black's should not mislead researchers into thinking the term was legally insignificant — it was simply assumed knowledge in the commercial law community of the era.
What the historical dictionaries do not address is the gradual obsolescence of the term as corporate and bookkeeping practices modernized through the late nineteenth and twentieth centuries. The evidentiary rules that once specifically addressed merchants' invoice books and shop books were largely absorbed into general business records doctrine by the mid-twentieth century.
---
Jurisdictional Note
The evidentiary treatment of invoice books and related merchants' records varied across American jurisdictions, with some states maintaining distinct "shop book" rules and others folding such records into general business entry doctrine. Researchers working with pre-twentieth-century commercial cases should check the applicable jurisdiction's specific rules on merchants' records before drawing conclusions about admissibility standards.
---