Embedded Payment Systems and Hidden Financial Intermediation Control

1. Introduction

Embedded payment systems are payment functions integrated directly into non-financial digital products or platforms. Examples include payments embedded in:

operating systems;

e-commerce marketplaces;

social-media platforms;

ride-hailing applications;

food-delivery applications;

gaming platforms;

cloud ecosystems;

enterprise software;

digital wallets;

app stores;

connected vehicles; and

healthcare or education platforms.

The competitive concern arises when a platform that is not traditionally perceived as a bank or payment intermediary nevertheless controls critical parts of the payment chain.

This can produce hidden financial intermediation control: the platform may technically leave regulated banking functions to licensed institutions while economically controlling the customer interface, transaction routing, payment data, merchant access, authentication, or settlement relationships.

From a competition-law perspective, the central question is:

Can control over an embedded payment layer allow a dominant digital platform to extend its market power into payments, financial services, merchant services, or adjacent markets?

2. What Is Hidden Financial Intermediation Control?

Traditional payment intermediation can be visualized as:

Customer → Bank/Payment Provider → Merchant

Embedded finance can create a more complex structure:

Customer → Digital Platform → Embedded Payment Interface → Payment Processor → Bank → Merchant

The platform may not formally be the bank or payment institution.

Nevertheless, it may control:

the user interface;

transaction initiation;

payment authentication;

merchant onboarding;

payment routing;

transaction data;

wallet functionality;

payment ranking;

access to customers.

Consequently, formal regulatory status and economic control may diverge.

A platform can become a powerful financial intermediary without necessarily being classified as a traditional financial intermediary.

3. Why Embedded Payments Create Competition Risks

Payment systems possess strong network effects.

A successful payment platform benefits from:

more consumers → more merchants → more transactions → greater attractiveness → more consumers.

This can produce a self-reinforcing ecosystem.

A dominant digital platform can additionally combine payment power with another market:

Marketplace dominance

↓

Embedded payment requirement

↓

Merchant dependence

↓

Payment-data accumulation

↓

Financial-services expansion

↓

Greater ecosystem power

This is particularly concerning where users cannot realistically avoid the platform's payment system.

4. Major Forms of Hidden Control

A. Mandatory payment routing

A platform may require all transactions occurring through its ecosystem to use its designated payment mechanism.

This can restrict competing payment providers.

B. Payment-system tying

A platform may tie access to its primary service to its payment service.

For example:

App-store access → mandatory platform payment

or

Marketplace participation → mandatory payment processor.

C. Payment-data advantage

The platform may obtain detailed information concerning:

transaction values;

purchasing behaviour;

merchant performance;

customer preferences;

transaction frequency;

financial relationships.

Such information can strengthen the platform's competitive position in adjacent markets.

D. Merchant lock-in

Merchants may depend upon one platform for:

customer access;

payment processing;

authentication;

advertising;

settlement;

transaction analytics.

This can make migration difficult.

E. Self-preferencing

A platform operating multiple financial services may favour:

its own wallet;

its own payment processor;

affiliated lending;

insurance products;

buy-now-pay-later services.

F. Discriminatory access

Competing payment providers may receive:

inferior APIs;

higher fees;

delayed approval;

reduced transaction limits;

restricted authentication access.

5. Competition-Law Theories

A. Tying and Bundling

Payment services can become a tied product.

A dominant platform may effectively say:

"If you want access to our platform, you must use our payment service."

Competition authorities can examine whether:

the platform is dominant in the tying market;

payment is a distinct product;

customers are coerced or economically compelled;

the conduct forecloses competitors;

there is an objective justification.

6. Refusal to Deal

A dominant platform may control an interface through which competing payment providers need access to consumers.

A refusal to permit access may raise concerns where the stringent conditions established by refusal-to-deal jurisprudence are satisfied.

However, competition law does not generally require every private infrastructure to be opened to competitors.

7. Self-Preferencing

A platform may give its own financial products preferential treatment.

For example:

Marketplace

→ Platform payment

→ Platform wallet

→ Platform lending

while competing financial services receive inferior access.

The competitive issue is whether the platform is using its gateway position to distort downstream competition.

8. Data Leveraging

Payment data can be a strategic input.

An ecosystem that combines:

search data;

shopping data;

location data;

transaction data;

advertising data;

financial data

may have substantial informational advantages over competitors.

This can create a data-feedback loop:

more transactions → more data → better targeting/risk assessment → better services → more users → more transactions.

Competition authorities therefore need to consider not only prices but also data accumulation and informational advantages.

9. Important Case Laws

1. United States v. Microsoft Corp. (2001)

Microsoft is an important precedent concerning the use of platform power to restrict complementary technologies.

Relevance to embedded payments

An operating-system or digital-platform provider may use technical control to favour its own payment functionality.

For example, it might:

restrict payment APIs;

prevent competing payment applications from accessing necessary functions;

impose technical restrictions on competing wallets.

Microsoft demonstrates that platform control can become antitrust-relevant where technological restrictions protect market power rather than simply improving the product.

10. European Commission v Microsoft, Case T-201/04

The EU Microsoft case concerned interoperability information and Microsoft's ability to restrict competitors' access to technical information.

Relevance

Embedded payment systems frequently depend upon:

APIs;

authentication;

secure elements;

tokenization;

device interfaces.

If a dominant platform selectively controls these technologies to prevent rival payment services from competing, the Microsoft interoperability principles become highly relevant.

11. Google Android, Case T-604/18

Google Android is particularly important for analysing ecosystem-level leverage.

The case concerned contractual arrangements involving Android and Google's related services, including tying issues.

Relevance

An operating system can be the gateway to payment services.

A platform could potentially condition access to:

app distribution;

device functionality;

authentication;

application APIs

on the use of its own payment infrastructure.

This can transform OS power into payment-market power.

12. Google Shopping, Case T-612/17

Google Shopping provides an important precedent concerning self-preferencing.

Relevance to payments

Imagine a dominant marketplace that offers several payment options but systematically places its own wallet or payment service ahead of competitors.

The Google Shopping framework illustrates how preferential treatment within a dominant platform can raise competition concerns where it distorts downstream competition.

13. Bronner v Mediaprint, Case C-7/97

Bronner establishes a demanding standard for requiring a dominant undertaking to provide access to infrastructure.

Relevance

A payment provider seeking access to a dominant platform's embedded payment interface cannot automatically claim a right of access.

It must satisfy the applicable legal requirements, particularly concerning indispensability and the absence of realistic alternatives.

This prevents competition law from becoming a general obligation to share every proprietary payment infrastructure.

14. IMS Health v NDC Health, Case C-418/01

IMS Health is important concerning intellectual-property rights and compulsory access.

Relevance

Payment systems often involve proprietary:

authentication technology;

APIs;

data structures;

transaction protocols.

A platform may invoke intellectual-property protection to restrict competitors.

IMS Health demonstrates that IP protection and competition law can intersect in exceptional circumstances.

15. Deutsche Telekom v Commission, Case C-280/08 P

The case concerned margin squeeze in telecommunications.

Relevance

A platform may nominally permit competing payment providers to access its ecosystem while structuring fees or conditions so that competitors cannot operate profitably.

Examples could include:

excessive API charges;

high transaction fees;

discriminatory infrastructure costs;

preferential pricing for the platform's own payment service.

The case demonstrates why economic access can matter as much as formal access.

16. Slovak Telekom v European Commission, Cases C-165/19 P and C-152/19 P

The case concerns infrastructure access and exclusionary conduct in telecommunications.

Relevance

Digital payment infrastructure increasingly resembles essential digital infrastructure.

The case provides useful analytical guidance where a dominant undertaking controls a gateway that downstream competitors need to reach customers.

17. Apple App Store Payment Disputes

The competition disputes involving Apple's App Store payment practices are especially relevant to embedded payment control.

The underlying issue is the relationship between:

Operating system

↓

App distribution

↓

Payment infrastructure

↓

Digital merchants/developers

Where a platform requires developers to use its proprietary payment mechanism, competition authorities may examine:

tying;

exclusion;

excessive commissions;

restrictions on alternative payment systems;

technical restrictions;

anti-steering provisions.

These disputes illustrate how a platform can transform payment processing from an ancillary function into a major source of ecosystem control.

18. Mastercard Interchange Fee Litigation

European competition litigation concerning Mastercard's multilateral interchange fees provides important insight into payment-system competition.

The underlying issue involves the competitive effects of payment-network rules and transaction economics.

Relevance

Embedded payment systems can create similar concerns where a dominant platform determines the economic conditions under which transactions occur.

The lesson is that payment networks are not necessarily neutral infrastructure. Their rules can influence:

merchant costs;

consumer prices;

payment-provider competition;

transaction routing.

19. Two-Sided Market Effects

Embedded payment systems frequently operate as multi-sided markets.

At least four groups may participate:

consumers;

merchants;

payment providers;

financial institutions.

The platform may subsidize one side while charging another.

Therefore, competition analysis should not focus solely on the price charged to consumers.

A platform may provide free payments to consumers while imposing substantial charges on merchants.

The relevant question is whether the overall competitive structure is being distorted.

20. The "Free Payment" Problem

A payment service may appear free to consumers.

However, the platform may monetize through:

merchant transaction fees;

advertising;

financial products;

data-driven services;

lending;

insurance;

subscriptions.

Thus:

zero consumer price ≠ absence of market power.

Competition authorities should consider quality, privacy, innovation, merchant costs, and data accumulation.

21. Embedded Payments and Financial Ecosystems

The most significant long-term risk arises when payment functionality becomes a gateway into broader financial services.

For example:

Payment

↓

Transaction data

↓

Credit scoring

↓

Consumer lending

↓

Insurance

↓

Investment products

↓

Financial marketplace

The platform can therefore move from being a technology intermediary to becoming an ecosystem-level financial gatekeeper.

This is why hidden financial intermediation control can be more significant than ordinary payment processing.

22. Merchant Lock-In

Merchant dependence can be particularly strong.

A merchant may use one platform for:

online storefront;

payment processing;

advertising;

logistics;

customer analytics;

inventory;

financing.

Switching payment providers may then require changes throughout the entire business system.

This creates ecosystem switching costs rather than merely payment-processing switching costs.

23. Interoperability

Interoperability is a critical competitive safeguard.

Competitive payment systems are easier to maintain where consumers and merchants can move between:

wallets;

banks;

payment networks;

platforms;

financial applications.

Interoperability reduces the platform's ability to use technical incompatibility as an entry barrier.

24. Multi-Homing

Competition is stronger when users can maintain multiple payment relationships.

For example, a merchant should ideally be able to support several payment providers without excessive technical duplication.

A dominant platform that makes multi-homing expensive can increase its market power.

Potential anti-competitive mechanisms include:

technical restrictions;

exclusivity;

default settings;

contractual restrictions;

discriminatory API access.

25. Regulatory and Competition-Law Overlap

Payment services are highly regulated.

Regulation may concern:

licensing;

anti-money-laundering;

customer authentication;

cybersecurity;

consumer protection;

payment security;

financial stability.

These requirements can legitimately justify certain restrictions.

But regulation should not automatically shield exclusionary conduct.

The key question is:

Is the restriction genuinely required by financial regulation, or is regulation being used as a pretext for excluding competing payment providers?

26. Hidden Intermediation and Regulatory Arbitrage

Embedded payment platforms may seek to position themselves between regulated and unregulated activities.

For example, the platform might:

own the customer relationship;

control payment initiation;

collect transaction data;

determine payment routing;

while leaving formal settlement to a licensed financial institution.

This can create a gap between legal responsibility and economic influence.

From a competition perspective, the relevant inquiry should therefore consider functional control, not merely the platform's formal legal classification.

27. Competition Risks From Acquisitions

A dominant platform may acquire:

payment processors;

fintech startups;

digital wallets;

identity providers;

lending platforms;

fraud-detection companies.

The acquisition can eliminate potential competitive constraints and strengthen the platform's ecosystem.

Particular scrutiny may be warranted where the target provides a critical interoperability layer or represents a potential future competitor.

28. Possible Remedies

Competition authorities may consider:

A. Payment choice

Allow users and merchants to select competing payment providers.

B. API access

Provide non-discriminatory technical access.

C. Anti-steering restrictions

Prevent platforms from prohibiting merchants from informing customers about alternative payment methods where appropriate.

D. Data portability

Allow merchants and consumers to transfer relevant transaction information.

E. Interoperability

Promote compatibility among payment systems.

F. Non-discrimination

Prevent preferential treatment of affiliated payment products.

G. Structural remedies

In exceptional cases, separation between platform and payment businesses may be considered.

29. Key Case-Law Matrix

30. Conclusion

Embedded payment systems can transform ordinary digital platforms into powerful financial gatekeepers. The platform may not formally be a bank, yet it can control the customer interface, payment initiation, transaction routing, merchant access, authentication, and transaction data.

The principal competition risks arise when that control is used to:

force use of a proprietary payment system;

exclude competing payment providers;

favour affiliated financial services;

restrict interoperability;

impose discriminatory access conditions;

exploit transaction data;

increase merchant switching costs; or

leverage dominance from another digital market into financial services.

The major authorities—including Microsoft, Microsoft v Commission, Bronner, IMS Health, Google Android, Google Shopping, Deutsche Telekom, Slovak Telekom, and Mastercard-related competition litigation—demonstrate that the analysis should focus on market power, foreclosure, interoperability, network effects, tying, discrimination, self-preferencing, access conditions, and objective justification.

The central principle is that embedding a payment function is not inherently anti-competitive. The competition problem arises when the embedded payment layer becomes a hidden gatekeeping mechanism through which a dominant platform controls access to financial transactions and uses that control to extend or protect its market power in adjacent markets.