Ofcom’s £520,000 Fine on 4chan Highlights Enforcement Limits of the UK Online Safety Act

In March 2024, the UK communications regulator Ofcom confirmed a £520,000 penalty against the US-based imageboard 4chan for lacking age-verification measures that would block children from accessing pornography. The fine follows an earlier August 2025 attempt to levy £20,000, which 4chan contested by filing a US lawsuit and replying to Ofcom with a hamster-themed image. 4chan’s counsel, Preston Byrne, has repeatedly described the regulator’s actions as “theatre” and insists the company faces no legal obligation to pay a fine imposed by a foreign authority.

The Independent

Legal analysts note that Ofcom’s authority to impose fines on companies without UK assets is uncertain. Myles Jackman, a specialist in sexual-liberties and obscenity law, says the case “lays bare one of the practical weaknesses of the OSA” because the regulator “has no right imposing fines on US-domiciled companies that they have no right to collect.” Preston Byrne adds that the UK government “has no jurisdiction over the American Constitution.” Nick Phillips, partner at Edwin Coe, concurs that enforcing the fine will be “difficult,” but points out the Online Safety Act does grant Ofcom a “nuclear option” to block access to non-compliant sites on UK ISPs.

The Independent

Both Jackman and Phillips warn that the dispute could become a “test case” for the extraterritorial reach of the Online Safety Act, potentially deterring foreign tech firms from operating in the UK. Phillips observes that several smaller platforms have already left the market because compliance was deemed “too difficult,” though he argues protecting under-age users justifies the regulator’s tools.

The Independent

Ofcom’s spokesperson said the regulator will “pursue the recovery of unpaid fines wherever possible, regardless of where the firm is based,” and explained that assets in the UK can be seized through court orders, while non-UK assets require international debt-recovery efforts. The Department for Science, Technology and Innovation has been contacted for comment but has not responded.

The Independent

• “ Mr Byrne said: “My client's position is that the OSA’s extraterritorial enforcement against it is theatre.” — Preston Byrne

The Independent

• “The UK government has no jurisdiction over the American Constitution,” — Preston Byrne

The Independent

• “This is undoubtedly a test case for global regulatory overreach,” — Myles Jackman

The Independent

• “These laws are there to protect UK consumers, particularly those who are underage.” — Nick Phillips

The Independent

• “If it has assets in the UK – as the ‘Big Tech’ companies do – the process is relatively straightforward and would usually involve going through the UK courts to seek orders for bailiffs to seize and sell UK assets in order to satisfy a debt,” — Ofcom spokesperson

The Independent