The Act primarily affects three classes of persons in the mercantile supply chain.

First, owners of goods who entrust possession or documents of title to mercantile agents. These owners lose the ability to assert lack of authority against a good-faith third party who takes in the ordinary course of business (s 5(1)), but retain the suite of remedies preserved by s 9, including the right to recover goods before sale or to redeem pledged goods.

Second, mercantile agents themselves. The definition in s 3 is restrictive; only those who in the customary course of their business have authority to sell, consign, buy or raise money on goods qualify. The Act both empowers and constrains them. It validates their acts for third parties but expressly does not exempt them from liability to their principals (s 9(1)(a)). The presumptions in s 6 operate in their favour when they are in possession, but can be rebutted.

Third, third-party purchasers, pledgees and lenders. This is the class the Act is designed to protect. A buyer or financier who acts in good faith and without notice that the agent lacks authority obtains indefeasible title or security interest. Consignees under s 4 who have no notice that the named consignor is not the owner obtain a lien equivalent to that which would arise if the consignor were the owner. The Act is of daily relevance to banks, warehouse operators, commodity traders, auction houses and factors in the wool, grain and shipping trades.

The Act does not directly impose duties on the general public; its operation is confined to commercial relationships involving goods or documents of title in the mercantile context. Insolvency practitioners are affected when an agent's bankruptcy triggers the bankruptcy-specific rules in s 9(2).

The statute creates few positive duties but a large number of rights and protections.

Rights of third parties (buyers/pledgees):

• Right to rely on a disposition by a mercantile agent in ordinary course as if expressly authorised (s 5(1)), provided good faith and absence of notice.
• Right to rely on continuing possession even after the entrusting has been determined (s 5(2)), again provided no notice of termination.
• Deemed entrustment and possession under the six presumptions in s 6.
• Lien for consignees who have no notice of want of title in the consignor (s 4(1)).
• Protection for advances made on the faith of a written agreement even if goods arrive later (s 6(6)).

Rights of owners:

• Right to recover goods from the agent or the agent's trustee in bankruptcy before any protected sale or pledge (s 9(1)(b)).
• Right to recover the price from a buyer, subject to the buyer's set-off against the agent (s 9(1)(c)).
• Right to redeem pledged goods by paying the secured sum plus any lien the agent could have claimed against the owner (s 9(1)(d)).
• In the agent's bankruptcy, the right to prove for sums paid on redemption or for the value of goods pledged (s 9(2)).

Rights and protections for agents:

• The Act does not enlarge the agent's actual authority vis-à-vis the principal (s 9(1)(a)), but validates the agent's acts for third parties.
• Common-law agency powers are expressly preserved (s 10).

There are no licensing or registration duties created by the Act; compliance is behavioural rather than administrative.

The Act creates no criminal offences or monetary penalties of its own. Section 9(1)(a) expressly states that nothing in the Act exempts an agent from any liability, civil or criminal, for exceeding authority. Therefore, if an agent's conduct amounts to embezzlement or fraud under the general criminal law, the Act provides no defence.

Enforcement is almost entirely civil. Owners enforce their preserved rights by action in detinue, conversion or for the price. Third parties who have obtained title under s 5 may defend actions brought by owners by pleading the statutory validation. Disputes typically turn on factual questions: whether the person was a "mercantile agent", whether the disposition was in the ordinary course, whether the third party had notice, and whether the third party acted in good faith.

Because the Act is declaratory of title, remedies are often declaratory or injunctive (to prevent delivery to a competing claimant) as well as damages. In pledge cases, the remedy may be redemption on terms or an account of surplus proceeds (s 9(1)(d)).

The Act is expressly stated to be in amplification and not in derogation of common-law agency powers (s 10). It therefore sits alongside the common-law rules on actual and apparent authority, ratification, and estoppel. Courts have historically read the statutory "ordinary course of business" requirement as importing common-law commercial usage.

It interacts with the Sale of Goods Act 1923 (NSW), particularly the nemo dat quod non habet rule and its exceptions. The Factors Act provides a specific statutory exception to nemo dat that overlaps with but is not identical to the seller-in-possession and buyer-in-possession exceptions in the Sale of Goods legislation.

In the bankruptcy context, s 9(2) dovetails with the Bankruptcy Act 1966 (Cth) by giving the owner a right to prove in the agent's bankruptcy for the value of redeemed goods or sums paid.

The Act's definitions of "document of title" and "goods" influence the application of the Personal Property Securities Act 2009 (Cth) (PPSA). While the PPSA has largely superseded traditional pledge concepts for security interests in personal property, a valid pledge perfected under the Factors Act prior to the PPSA's commencement may retain priority, and the good-faith purchase protections continue to operate in respect of outright sales.

Section 2 repeals the earlier Factors Acts of 1823, 1825 and 1899, but the savings in s 2(2) ensure that transactions completed before 31 December 1923 remain governed by the repealed legislation.

The Act has remained substantially unamended since its commencement on 31 December 1923. The only formal change of note is the updating of language and cross-references in the official reprint to reflect modern drafting conventions and the current citation of the Act itself. No substantive policy amendments appear to have been made.

This legislative stability reflects the enduring commercial utility of the 19th-century Factors Acts model. The rules have proved sufficiently flexible to accommodate changes in mercantile practice from sailing ships to containerised transport and electronic documents of title. Where modernisation has been required (for example, in relation to electronic bills of lading), it has occurred through amendments to the Sea-Carriage Documents Act 1998 (NSW) and the PPSA rather than by rewriting the Factors Act. The absence of recent change is therefore not neglect but recognition that the balance struck in 1923 between owner protection and third-party commercial certainty remains appropriate for contemporary Australian conditions.

The source text itself does not record specific court decisions; however, the structure of the Act reveals the points that have historically generated litigation.

The central controversy has always been the meaning of "in the ordinary course of business of a mercantile agent". Section 5(1) makes this the gateway to statutory protection. Courts have consistently required that the disposition must be one that a mercantile agent acting in the ordinary course would make, judged from the perspective of the third party. Transactions at undervalue, after-hours deals, or dispositions to associated entities have been held outside ordinary course.

Another recurring issue is the concept of "notice". The Act uses the phrase "has not at the time of the disposition notice that the person making the disposition has not authority". The text does not define notice, leaving courts to apply the common-law distinction between actual notice and constructive notice. Section 6(6) expressly requires absence of notice that the agent was not authorised to make the pledge.

The interaction between the Act and bankruptcy law in s 9(2) has also been fertile ground. The provision that an owner who redeems is deemed to have paid for the use of the agent before bankruptcy creates a statutory set-off that can affect the distribution to other creditors.

Controversies around electronic documents of title and whether they fall within the s 3 definition have emerged in recent decades, but the Act's inclusive language ("any other document used in the ordinary course of business as proof of the possession or control of goods") has generally been regarded as capable of adapting to new technology, subject to specific legislation such as the Electronic Transactions Act 2000 (NSW).

No attempt to repeal the Act has succeeded; its retention reflects continuing judicial and commercial acceptance of its core policy.

Most practitioners assume that once a person is described as an "agent" the Act automatically applies. That is incorrect. Only those who satisfy the strict s 3 definition of "mercantile agent" – having customary authority to sell, consign, buy or raise money on goods – qualify. A real-estate agent or a stockbroker dealing in shares will not be a mercantile agent for these purposes.

Another common error is believing that the Act protects against all notice. The presumptions in s 6 are powerful but rebuttable. If the third party is put on inquiry by suspicious circumstances (for example, an unusually low price or the agent's known financial distress), the statutory protection may be lost even without actual knowledge of lack of authority.

Section 8 is frequently overlooked. A pledge for an antecedent debt gives the pledgee no greater rights than the agent possessed at the time of pledge. Banks that take goods as security for an existing overdraft without a fresh advance may find their security is limited or illusory.

The interaction with the PPSA is a trap for the unwary. While the Factors Act validates title, a security interest granted by an agent may still require perfection under the PPSA to prevail against other secured parties. Failure to register a financing statement can render an otherwise valid pledge under this Act commercially worthless in an insolvency.

Finally, s 9(1)(d) is often misread. The owner who wishes to redeem must pay not only the secured sum but, if demanded, any sum for which the agent would have a lien against the owner. Many owners discover too late that the agent's unpaid commission or storage charges must also be discharged before the goods can be recovered.

Compliance for owners involves careful documentation and control of entrustment. Owners should:

• Use written agency agreements that expressly limit the agent's authority and require the agent to notify third parties of those limits.
• Avoid handing over original documents of title unless strictly necessary; where possible, use non-negotiable receipts or electronic systems that allow revocation.
• Conduct periodic audits of goods held by agents and maintain insurance that covers unauthorised dispositions.

For mercantile agents, compliance requires:

• Never representing greater authority than actually possessed.
• Maintaining clear records of all entrustments and instructions received.
• Ensuring that any disposition is transparently in the ordinary course (for example, through recognised auction houses or on standard terms).

For buyers, financiers and consignees, due diligence should include:

• Verifying that the counterparty is in fact a mercantile agent within the s 3 definition (trade association membership, history of similar transactions).
• Conducting basic searches for any known financial difficulty of the agent.
• Obtaining written confirmation or statutory declarations where the transaction is large or the price appears favourable.
• Registering any security interest under the PPSA promptly and correctly.

In all cases, parties should retain contemporaneous evidence of good faith and absence of notice. Standard form contracts used in the relevant trade should expressly refer to the Act and allocate risk of unauthorised disposition.

Legal opinions on title should routinely address the application of this Act, especially in commodity financing, wool and grain trading, and international sales involving Australian agents. Regular training for commercial staff on the difference between actual authority and the statutory protection under s 5 is a prudent compliance measure.

Because the Act has stood largely unchanged for a century, its requirements are well understood by specialist mercantile lawyers. However, its interaction with the PPSA and electronic commerce legislation requires updated advice at least annually for firms with significant exposure to goods financing.