What is a Memorandum of Incorporation (MOI)?
Is a Memorandum of Incorporation legally binding in South Africa?
“Each provision of a company’s Memorandum of Incorporation— (a) must be consistent with this Act; and (b) is void to the extent that it contravenes, or is inconsistent with, this Act (s 15(1)). A company’s Memorandum of Incorporation, and any rules of the company, are binding— (a) between the company and each shareholder; (b) between or among the shareholders of the company; and (c) between the company and— (i) each director or prescribed officer of the company (s 15(6)). The shareholders of a company may enter into any agreement with one another concerning any matter relating to the company, but any such agreement must be consistent with this Act and the company’s Memorandum of Incorporation, and any provision of such an agreement that is inconsistent with this Act or the company’s Memorandum of Incorporation is void to the extent of the inconsistency (s 15(7)).”
“Section 15(6) simply provides that the MOI and the rules, if made, are binding without stating in which way they are binding. The provisions of the constitutive documents … are interpreted by courts and academic writers to amount to a statutory contract between a company and its members and between members inter se. … The statutory contract … is again of a peculiar nature in that, unlike an ordinary contract, its validity cannot be tested on the usual grounds of mistake, misrepresentation or undue influence. Rectification of the statutory contract is not possible since its alteration requires special resolution of the members even without the consent of all contracting parties.”
When you need a Memorandum of Incorporation
- You are incorporating a new (Pty) Ltd, NPC, personal liability (Inc) or public company and must register a Memorandum of Incorporation with CIPC — the standard CoR15.1A form, or a tailored CoR15.1B long-form MOI.
- Two or more founders are going into business together and want the share classes, voting, board appointment, pre-emptive rights and deadlock mechanics built into the company’s constitution, not just a separate handshake.
- You are putting a shareholders’ agreement in place and need the MOI aligned with it — because under section 15(7) any shareholders’ agreement term that conflicts with the MOI (or the Act) is void to the extent of the inconsistency.
- A funder, B-BBEE partner or contract counterparty requires the company to be “ring-fenced” (RF) — limiting its capacity, powers or the directors’ authority — which must be created in the MOI and flagged in the company’s name and notice of incorporation.
- You converted from a close corporation, are still on a pre-2008 memorandum and articles, or have outgrown the default MOI, and need it modernised and amended by special resolution and re-filed with CIPC.
- You are buying, selling or raising investment into a company and due diligence turns up an outdated, generic or internally contradictory MOI that needs to be reviewed and corrected before the deal closes.
What a Memorandum of Incorporation should contain
Required (incorporation) information
The mandatory content the Act demands: the company name and registration details, the company type (e.g. private, public, NPC, personal liability), whether it is profit or non-profit, and the foundational facts of incorporation. Get these wrong and CIPC will reject the filing.
Share capital and classes of shares
The authorised shares, the number and classes, and the preferences, rights, limitations and voting attached to each class. For a company with more than one share class — or future investment in mind — this is the most consequential part of the MOI to draft deliberately rather than accept by default.
Directors, the board and decision-making
How directors are appointed and removed, the minimum and maximum number, quorum and voting at board level, and any extra duties or eligibility rules. The MOI can raise (but not lower) the Act’s standards, and can allocate appointment rights to particular shareholders.
Shareholder meetings, voting and majorities
Quorum, voting thresholds and what counts as an ordinary versus special resolution. The MOI may set higher percentages or more onerous requirements than the Act’s defaults (for example, a higher special-resolution threshold) — a common protection for minority shareholders.
Alteration of alterable provisions
A deliberate choice on which of the Act’s default “alterable” rules to keep, vary or switch off — and which “unalterable” rules must stand untouched. This is where a bespoke MOI earns its keep: the default form simply leaves the Act’s defaults in place.
Pre-emptive rights and transfer restrictions
In a private company, restrictions on the transfer of shares and pre-emptive rights (a fellow shareholder must be offered shares first) are typically entrenched in the MOI so they bind under section 15(6), making them enforceable between shareholders as a statutory contract.
Restrictive conditions and “RF” ring-fencing (s 15(2))
Optional special conditions that restrict the company’s capacity, powers or activities, restrict the amendment of a provision, or require a particular condition to amend it. If used, the company must carry the “RF” suffix and flag the restriction so that, exceptionally, third parties are deemed to have notice of it.
Amendment procedure (s 16)
How the MOI itself may be changed — ordinarily by special resolution and by filing a Notice of Amendment (CoR15.2) with CIPC — together with any entrenched, more onerous amendment conditions the founders choose to lock in for protection.
Memorandum of Incorporation (MOI) vs Shareholders’ Agreement in South Africa
| Feature | Memorandum of Incorporation (MOI) | Shareholders’ Agreement |
|---|---|---|
| Legal source | Founding document required and governed by the Companies Act, s 15 | Private contract among shareholders, permitted by s 15(7) |
| Who is bound | The company, all shareholders (incl. future ones) and directors | Only the shareholders who actually sign it |
| Public visibility | Filed at CIPC and part of the public record | Private — not filed and usually confidential |
| Ranking on conflict | Prevails — a conflicting shareholders’ agreement term is void | Must be consistent with the MOI and the Act (s 15(7)) |
| How it is changed | Special resolution + Notice of Amendment (CoR15.2) filed with CIPC | By agreement of the parties, per its own variation clause |
| Effect on outsiders | No constructive notice of internal limits, except RF companies (s 19(4)) | No effect on third parties — it is purely internal |
Common South African pitfalls
- Relying on the CIPC standard short-form MOI (CoR15.1A) for a company with co-owners or outside investment. The default form leaves the Act’s alterable rules in place and contains no pre-emptive rights, board-appointment rights, deadlock or share-class structure — so it rarely reflects how the owners actually intend to run and exit the business.
- Putting the deal terms only in a shareholders’ agreement and ignoring the MOI. Under section 15(7) a shareholders’ agreement must be consistent with the MOI and the Act, and any inconsistent provision is void to the extent of the inconsistency — so a side agreement that contradicts the MOI is unenforceable on that point.
- Trying to “contract out” of an unalterable provision. Section 15(1) prohibits an MOI provision that is inconsistent with the Act or that alters an unalterable provision (other than by imposing a higher or more onerous standard), and such a provision is void — you cannot, for example, dilute statutory minority or creditor protections in the MOI.
- Assuming outsiders are bound by internal MOI restrictions. Section 19(4) abolished constructive notice of the MOI, so a third party is generally not deemed to know a limit buried in the MOI — unless the company is correctly set up and named as a ring-fenced “RF” company with the restriction flagged, the company may still be bound to the outsider.
- Amending the MOI without following section 16. Most amendments require a special resolution and a Notice of Amendment (CoR15.2) filed with CIPC; an amendment that is not properly resolved and filed does not take effect, leaving the company operating on the old MOI.
- Leaving an outdated MOI in place after a conversion or restructure. Companies converted from a close corporation, or still running on a pre-2008 memorandum and articles or a generic template, often have an MOI that contradicts their share structure or current shareholders’ agreement — a problem that surfaces, expensively, in due diligence on a sale or funding round.
Frequently asked questions
What is the difference between an MOI and a shareholders’ agreement?
The MOI is the company’s public founding document, filed at CIPC and binding on the company, all shareholders (including future ones) and directors. A shareholders’ agreement is a private contract that binds only the shareholders who sign it. Under section 15(7) of the Companies Act the shareholders’ agreement must be consistent with the MOI and the Act, so the MOI prevails where they conflict.
Is the MOI the same as the old memorandum and articles of association?
No — it replaces them. Under the Companies Act 61 of 1973 a company had two documents: a memorandum (its external constitution) and articles of association (its internal rules). The Companies Act 71 of 2008 merged these into a single Memorandum of Incorporation. Companies still on the old documents are deemed to operate under a transitional MOI until they adopt a new one.
Can I just use the standard CIPC MOI (CoR15.1A)?
You can, and for a simple single-owner company it is often enough. The standard short-form MOI (CoR15.1A) keeps the Companies Act’s default rules in place. But it has no tailored share classes, pre-emptive rights, board-appointment rights or deadlock mechanics, so most companies with co-owners or outside investors need a bespoke long-form MOI (CoR15.1B) instead.
What are alterable and unalterable provisions?
Alterable provisions are the Companies Act’s default rules that a company may vary, restrict or switch off in its MOI. Unalterable provisions are mandatory rules that an MOI cannot reduce — though section 15(2) allows an MOI to impose a higher or more onerous standard than an unalterable provision. Any MOI term that is inconsistent with the Act or weakens an unalterable provision is void to that extent.
What is an “RF” (ring-fenced) company?
An RF company is one whose MOI contains a special restrictive condition under section 15(2) — for example limiting the company’s capacity, powers or activities, or restricting how a provision may be amended. The company must add “RF” to its name and flag the restriction in its notice of incorporation. Because section 19(4) otherwise abolishes constructive notice, the RF flag is what makes third parties deemed to have notice of the restriction.
How do you amend a Memorandum of Incorporation?
In most cases the MOI is amended by a special resolution of shareholders (ordinarily at least 75% support) and by filing a Notice of Amendment (CoR15.2) with CIPC. Some amendments — such as correcting an error or a board-authorised change to the authorised shares — can follow a different route. Until the amendment is properly resolved and filed, the company remains bound by the existing MOI.
Is the MOI legally binding on directors and shareholders?
Yes. Section 15(6) of the Companies Act makes the MOI binding between the company and each shareholder, among the shareholders themselves, and between the company and each director, prescribed officer or board-committee member in their functions. South African company law treats it as a statutory contract, so shareholders can enforce MOI rights — such as pre-emptive rights — against one another and against the company.
Does a third party dealing with the company have to read the MOI?
Generally no. Section 19(4) of the Companies Act abolished the doctrine of constructive (deemed) notice, so an outsider is not automatically taken to know the internal limits in a company’s MOI. The exception is a ring-fenced “RF” company that has correctly flagged its restriction — there, third parties are deemed to have notice of that restriction and are bound by it.
Sources & authority
- Companies Act 71 of 2008, ss 13, 15, 16 and 19 (incorporation, MOI, amendment, legal status / constructive notice)
- Morajane “The Binding Effect of the Constitutive Documents of Companies: The 1973 and 2008 Companies Acts of South Africa” [2010] PER 5 (Potchefstroom Electronic Law Journal)
This guide is general information, not legal advice. It reflects the law as at June 2026.