By Ed Jowett May 6, 2026
Building a payment system that works across multiple countries sounds like a technical problem until you are actually doing it, and then it becomes apparent that the technical work is the easier part. The harder part is navigating a compliance landscape that is simultaneously global in its reach and intensely local in its specific requirements, where a payment integration that is fully compliant in one jurisdiction may require significant modification to be compliant in another, and where the consequences of getting it wrong range from financial penalties to loss of the ability to process payments in entire markets.
A business implementing payment APIs through multiple geographical areas is faced with an issue of compliance that has become significantly more complicated within the last decade due to the fact that global authorities have started developing ever more intricate and stringent guidelines for handling payment information, verifying users’ identities, supervising payment processes, and securing the infrastructure necessary for performing transactions.
PCI DSS compliance standards for enterprises, PSD2 legislation, the requirement for Strong Customer Authentication, and other types of regional and national payment regulations do not make up a consistent system. Instead, there are various, potentially competing, and constantly changing rules that must be followed simultaneously by an enterprise implementing payment APIs throughout all markets it operates within. A comprehensive comprehension of how to address such problems requires not only knowing which laws are applicable within each important region but also taking an enterprise risk management approach towards dealing with the task at hand.
PCI DSS Enterprise Compliance as the Global Baseline
Whatever else changes about the payment compliance landscape in different markets, PCI DSS enterprise compliance is the common thread that runs through payment security requirements globally. The Payment Card Industry Data Security Standard, maintained by the PCI Security Standards Council, applies to any organization that stores, processes, or transmits cardholder data, regardless of where that organization is based or where its customers are located.
For enterprises integrating payment APIs across multiple countries, PCI DSS is the foundational compliance layer that must be in place before regional or national requirements are addressed, because most card networks require PCI compliance as a condition of participation and because many regional payment regulations reference PCI standards as a baseline that satisfies their technical security requirements.
Enterprise-scale PCI compliance is qualitatively different from the compliance effort of a small merchant completing an annual self-assessment questionnaire. Large organizations processing significant transaction volumes across multiple systems and geographies are typically subject to Level 1 compliance requirements, which involve annual on-site assessments by a Qualified Security Assessor, quarterly network scans by an Approved Scanning Vendor, and penetration testing that verifies the security of the cardholder data environment at a depth that lower compliance levels do not require.
The scope management aspect of PCI DSS compliance at an enterprise level is especially difficult for enterprises with intricate and dispersed payment infrastructure since all systems that handle cardholder information fall under the scope of compliance, and the cost and difficulty of compliance are directly proportional to the size of the scope. Creating payment APIs that limit cardholder information exposure by employing tokenization and end-to-end encryption, as well as leveraging hosted payment pages that store cardholder information within the environment of the payment processor that is certified rather than transmitting cardholder information through merchant infrastructure, is not only a prudent security measure but also an effective way to reduce scope.
PSD2 Regulations and the European Compliance Framework
The European Union’s revised Payment Services Directive, commonly known as PSD2, represents one of the most significant regulatory developments in global payment compliance over the past decade and is essential reading for any enterprise integrating payment APIs in European markets. PSD2 regulations introduced a comprehensive framework for payment services across the European Economic Area that affects how payments are initiated, how consumers are authenticated, how third-party payment service providers access account data, and how fraud liability is allocated between banks, merchants, and payment service providers.
For enterprises building payment integrations, the most immediately relevant dimension of PSD2 regulations is the requirement for Strong Customer Authentication in electronic transactions, which fundamentally changed how online payments are processed in European markets. Beyond SCA, PSD2 regulations established open banking as a regulatory framework, requiring banks to provide standardized API access to authorized third parties who have obtained the appropriate licenses. This open banking infrastructure creates opportunities for payment initiation services and account information services that did not exist before PSD2, but it also creates compliance responsibilities for organizations that want to act as third-party providers under the framework.
The requirement to obtain the proper regulatory approval for operating as either a Payment Initiation Service Provider or an Account Information Service Provider under the PSD2 framework entails collaboration with the national competent authorities, fulfillment of certain capital adequacy norms, the deployment of security controls in line with the technical specifications laid down by the European Banking Authority, and continuous regulatory reporting obligations. Companies that are developing payment products using open banking technology in Europe must determine whether they require PISP or AISP authorization.
SCA Authentication: Implementation Challenges and Exemptions
Strong Customer Authentication represents the most operationally demanding compliance requirement for most enterprises processing online payments in European markets, and understanding both the requirement itself and the exemption landscape is essential for building payment integrations that are compliant without creating unnecessary friction that damages conversion rates. SCA authentication requires that electronic payment transactions be authenticated using at least two of three possible factors: something the customer knows such as a password or PIN, something the customer has such as a phone or hardware token, and something the customer has such as a fingerprint or facial recognition.
The practical implementation of SCA authentication in online payment flows typically involves 3D Secure 2, the card network’s authentication protocol that enables the exchange of SCA authentication data between the merchant, the payment service provider, and the cardholder’s bank. 3DS2 represents a significant improvement over its predecessor in that it supports biometric authentication, enables frictionless authentication for low-risk transactions through risk-based decisioning, and provides the technical infrastructure for merchants to apply for SCA exemptions without simply bypassing authentication entirely.
Exemptions represent a critical area in SCA authentication for businesses seeking to enhance their conversion process in addition to achieving compliance. There exist several exemptions when it comes to certain types of transactions. These include transactions with values below thirty euros, merchant initiated transactions that involve prior setup of the payment mandate by the consumer, transactions that utilize corporate payment instruments, and transactions that meet the criteria of transaction risk analysis conducted either by the acquirer or the issuer.
It is worth noting that the exemption based on transaction risk analysis represents the greatest value for businesses engaged in many low-risk transactions since it will enable them to authenticate only those customers who pose a risk without exempting the low-risk customers.
Regional Payment Regulations Beyond Europe
While PSD2 and SCA authentication have received the most attention in global payment compliance discussions due to their significant operational impact on European payment flows, enterprises integrating payment APIs globally face an equally complex compliance landscape in other major markets that requires dedicated analysis rather than a single Europe-focused compliance program. In the United States, the payment regulatory environment is more fragmented than Europe’s, with oversight distributed across the Federal Reserve, the Consumer Financial Protection Bureau, state money transmission licensing regimes, and card network rules rather than a single unified directive.
Enterprise risk management for US payment integrations requires tracking state-by-state licensing requirements for money transmission, which vary significantly in their scope, their application requirements, and the activities they cover, and ensuring that the payment product’s business model is correctly classified for regulatory purposes. In India, the Reserve Bank of India has established a comprehensive digital payment regulatory framework that includes specific requirements for payment aggregators and payment gateways operating in the Indian market, data localization requirements that mandate the storage of Indian payment data within India, and a licensing regime that affects which entities can provide payment services to Indian merchants and consumers.
The payment system in China works under the regulation structure governed by the People’s Bank of China, where foreign payment service providers have to operate via licensed local companies, with specific rules on cross-border data transfers and foreign exchange transactions. In all these regional compliance structures, separate analysis needs to be done compared to a single worldwide payment compliance solution, which makes enterprise risk management a continuous organizational process rather than a one-off project.
Data Residency and Cross-Border Data Flows
One of the most practically challenging compliance dimensions of global payment API integration is the management of data residency requirements and cross-border data flow restrictions that affect how payment data can be stored and processed across international boundaries. Payment transactions generate data about cardholders, merchants, and transactions that are subject to privacy and data protection regulations in every jurisdiction where it is collected, stored, or processed, and these regulations increasingly include specific requirements about where data must be physically stored and what constraints apply to its transfer across national borders.
The General Data Protection Regulation in Europe establishes that personal data about EU residents can only be transferred to non-EU countries that provide an adequate level of data protection or that have appropriate safeguards in place, such as standard contractual clauses or binding corporate rules. For payment service providers and enterprises processing European cardholder data in global data center infrastructure, this means ensuring that their data architecture can demonstrate appropriate protections for cross-border data transfers or can localize European data within European infrastructure where the regulatory risk of cross-border transfer is unacceptable.
Data localization requirements relating to payment data in India are some of the strictest in the world, in that there is an obligation to store certain types of payment data in India exclusively, without any cross-border transfers possible irrespective of any security mechanisms in place. The consequence of this is that global payment companies have been required to establish a separate data infrastructure in India which does not connect to the company’s global network at all, something that may be both costly and operationally difficult but is unavoidable for those that would like to offer services in India.
While data localization regulations on payments continue to expand globally instead of shrinking, it means that the data architecture of global payment integrations should be designed such that they allow for localization down the line in other markets.
Anti-Money Laundering and Know Your Customer Requirements
Payment API integrations that enable fund transfers between parties are subject to anti-money laundering and know your customer compliance requirements in virtually every jurisdiction, and these requirements add a layer of compliance complexity that is distinct from but interacts with the payment security and authentication requirements already discussed. AML and KYC requirements for payment services typically include obligations to verify the identity of customers before allowing them to use the service, to monitor transactions for patterns that suggest money laundering or terrorism financing, to report suspicious transactions to the relevant financial intelligence authorities, and to maintain records of transaction monitoring activity for the periods specified by each jurisdiction’s requirements.
The specific thresholds, verification requirements, and reporting obligations vary significantly between jurisdictions, but the general framework of identifying customers, monitoring transactions, and reporting suspicious activity is consistent across most major markets. Enterprise risk management for AML and KYC compliance in a multi-jurisdiction payment integration requires building transaction monitoring systems that can apply different rule sets to transactions in different markets, maintaining customer identity verification systems that can satisfy the specific documentation requirements of each jurisdiction, and establishing relationships with the relevant financial intelligence authorities in each market where reporting obligations apply.
The challenge for enterprises processing high transaction volumes across many markets is building monitoring and reporting systems that are comprehensive enough to satisfy regulatory requirements in all markets without generating false positive rates that overwhelm the compliance team’s capacity to investigate alerts meaningfully. Machine learning-based transaction monitoring has become increasingly important in addressing this challenge, but the deployment of these systems itself requires validation and testing that demonstrates to regulators that the models are performing as intended.
Liability Frameworks and Chargeback Management
The allocation of fraud liability across payment system participants varies between regulatory frameworks in ways that have significant financial implications for enterprises integrating payment APIs globally. Understanding how fraud liability is allocated in each market where a payment integration operates is an important element of enterprise risk management because it directly affects the financial exposure associated with fraud events and influences the investment decisions around fraud prevention and authentication that are appropriate for each market.
In European markets under PSD2 regulations, the implementation of SCA authentication shifts fraud liability from the merchant to the payment service provider when SCA has been applied and the authentication was successful but the transaction was subsequently identified as fraudulent. This liability shift creates a strong incentive for payment service providers to implement SCA authentication and to seek SCA exemptions only for transactions that genuinely qualify rather than as a general strategy for reducing checkout friction.
For merchants, the implications are that SCA authentication performed through 3DS2 provides liability protection that unauthenticated transactions do not, which is an additional consideration alongside the conversion impact when deciding how aggressively to apply SCA exemptions.
Chargeback management across multiple markets requires understanding the specific chargeback rules and timelines that apply under each card network’s operating rules in each region, because these rules differ in significant ways that affect both the merchant’s ability to dispute fraudulent chargebacks and the evidence required to do so successfully. Building a chargeback management program that is calibrated to the specific rules of each market rather than applying a single global approach produces better chargeback win rates and lower net fraud losses than a uniform approach that ignores regional variation.
Vendor Due Diligence and Third-Party Risk
Enterprises integrating payment APIs globally typically rely on a network of third-party service providers including payment processors, fraud prevention services, identity verification providers, data storage vendors, and API management platforms, each of which introduces compliance risk that must be managed as part of a comprehensive enterprise risk management program. PCI DSS enterprise compliance requires that third-party service providers who have access to cardholder data are themselves PCI compliant and that their compliance status is verified through contractual agreements and regular review rather than assumed.
This third-party risk management requirement becomes substantially more complex when the vendor network spans multiple countries, because the relevant compliance certifications and regulatory authorizations differ between jurisdictions and because the contractual frameworks required to establish appropriate data protection safeguards vary with the data protection law of each jurisdiction. Building a vendor due diligence program that systematically assesses the compliance posture of all third-party payment service providers before onboarding and on an ongoing basis requires both the right contractual templates and the organizational capability to review and act on due diligence findings.
Organizations that discover during a regulatory audit that a key third-party vendor was not PCI compliant or did not hold required payment service licenses in markets where it was processing transactions face significantly worse regulatory outcomes than those that can demonstrate a systematic vendor management program that identified and addressed the issue before the audit. The investment in building a vendor due diligence capability proportional to the complexity of the third-party network is therefore an enterprise risk management investment that protects against scenarios where third-party compliance failures become organizational compliance failures.
Building an Enterprise Payment Compliance Program
The breadth and complexity of global payment compliance requirements makes clear that compliance cannot be addressed through a collection of individual regulatory responses. It requires building an organizational capability, an enterprise payment compliance program, that continuously monitors regulatory developments across all relevant markets, maintains current documentation of the compliance requirements applicable to each market, translates regulatory requirements into technical and operational specifications that the payment integration must satisfy, and tracks the organization’s compliance posture against these requirements on an ongoing basis.
Global payment regulations do not stand still, and a compliance program that was current at the time of an initial integration review will drift out of compliance as regulations evolve unless it includes systematic monitoring of regulatory changes and a process for assessing and implementing the integration modifications required to maintain compliance. PCI DSS enterprise compliance requirements are updated on a regular cycle, PSD2 regulatory technical standards are refined through ongoing EBA guidance, and new payment regulations in emerging markets are introduced with increasing frequency as digital payment adoption accelerates globally.
Building the organizational processes and expertise to track these changes, assess their impact on existing integrations, and implement required modifications within applicable timelines is as important as building the technical capability to satisfy any specific compliance requirement that exists at the moment of initial integration. The organizations that maintain genuine global payment compliance over time are those that treat it as an ongoing business function rather than a project that is completed at the time of initial deployment.
Conclusion
Integrating payment APIs globally is an exercise in managing complexity that extends well beyond the technical challenges of building reliable, performant connections between payment systems. PCI DSS enterprise compliance provides the security foundation that all card-based payment integrations require. PSD2 regulations and SCA authentication requirements define the authentication and open banking compliance landscape for European markets. Global payment regulations in major markets including the US, India, China, and others add layers of licensing, data residency, and operational requirements that must be addressed market by market rather than through a single unified approach.
Enterprise risk management that treats global payment compliance as an ongoing organizational capability, supported by systematic regulatory monitoring, vendor due diligence, and technical architecture designed for compliance flexibility, is the approach that sustains compliant payment operations across a growing geographic footprint over time.
The enterprises that invest in building this capability early, before the complexity of their payment architecture outgrows their compliance infrastructure, are consistently better positioned to expand into new markets, respond to regulatory changes, and avoid the enforcement actions that result from compliance approaches that were adequate for a simpler version of the business but did not scale alongside the payment integration they were meant to govern.
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