Insights for African Digital Payments

Key Trends Driving Growth

• Merchant digitisation: The Bank of Zambia's Digital Finance Policy has accelerated small business onboarding, with over 180,000 new merchant accounts registered in 2025 alone.
• Agent network expansion: Rural agent penetration has reached 84% of districts, enabling payments in areas with no traditional banking infrastructure.
• B2B payments: B2B mobile money transfers grew 180% YoY, driven by supply chain digitisation in mining and agriculture sectors.
• Cross-border corridors: Zambia–Zimbabwe and Zambia–Botswana corridors are now live, reducing remittance costs from 8% to under 3%.

What This Means for Merchants

For businesses accepting payments in Zambia, mobile money is no longer an optional payment method — it is the primary one. Our data shows that over 73% of NexaPay transactions in Zambia are initiated via mobile money, with card payments representing less than 12% of volume.

"Mobile money in Zambia has crossed the chasm from 'alternative payment' to 'primary payment rail'. Businesses that don't accept it are leaving significant revenue on the table." — NexaPay Market Research, 2026

The Regulatory Landscape

The Bank of Zambia continues to strengthen its regulatory framework for digital payments. The 2025 National Payment Systems Amendment Act introduced enhanced consumer protection, clearer dispute resolution timelines, and tighter AML requirements.

1. Always Verify the Signature

Every NexaPay webhook POST includes an X-NexaPay-Signature header. This is an HMAC-SHA256 hash of the raw request body using your webhook secret. Never process a webhook event without verifying this signature — it prevents replay attacks and spoofed events.

2. Return 200 Immediately, Process Asynchronously

Your webhook endpoint should respond with HTTP 200 within 5 seconds. If your handler takes longer, push the event to a queue (Redis, RabbitMQ, SQS) and process it in the background. NexaPay will retry events that receive non-2xx responses or timeout, up to 5 times with exponential backoff.

3. Handle Duplicate Events Idempotently

Due to network retries, you may occasionally receive the same event more than once. Use the event's unique event_id to check whether you have already processed it before taking action.

• Store processed event_id values in a Redis set or database table
• On receipt, check if the ID exists before processing
• Set a TTL of 7 days on stored event IDs

4. Use a Dedicated Webhook Endpoint

Create a dedicated /webhooks/nexapay endpoint with signature verification middleware, raw body parsing, and structured logging for every event received.

5. Monitor Your Webhook Health

Use the NexaPay dashboard's Event Inspector to see every event sent to your endpoint, its delivery status, and retry history. Set up alerts for sustained failure rates above 5%.

"A webhook that silently fails is worse than no webhook at all. Build monitoring and alerting from day one, not as an afterthought." — NexaPay Developer Experience Team

Zimbabwe's Unique Currency Environment

Zimbabwe operates a dual-currency environment — the Zimbabwe Gold (ZWG) and USD. EcoCash supports both, though USD wallets have higher limits and are preferred for larger transactions. NexaPay automatically routes USD charges to USD-capable wallets and ZWG charges to local wallets.

PIN Push vs. USSD Flow

EcoCash in Zimbabwe uses a PIN push model — your customer receives an on-screen prompt on their phone and enters their EcoCash PIN to authorise the payment. The NexaPay checkout flow handles this natively — you simply initiate the charge and we manage the customer communication.

Handling Zimbabwe-Specific Edge Cases

• Dual currency routing: Specify currency: "USD" for dollar transactions and currency: "ZWG" for local currency.
• Network downtime: EcoCash occasionally experiences scheduled maintenance windows. NexaPay automatically queues and retries charges during these windows.
• Transaction limits: EcoCash USD wallets have a $1,000 per-transaction limit and $5,000 per-day limit.
• Telecash and OneMoney: Both networks are supported via the same API endpoint — just change the network parameter.

Testing in Sandbox

Our sandbox includes test phone numbers that simulate different EcoCash scenarios: successful payments, insufficient funds, PIN timeout, and network timeout.

"EcoCash in Zimbabwe has its quirks — dual currency, PIN authentication, and occasional maintenance windows — but once you understand the model, integration is straightforward via NexaPay." — A satisfied Zimbabwe-based merchant

The Regulatory Landscape at a Glance

• Zambia (Bank of Zambia): National Payment Systems Directive requires merchant identity verification and transaction monitoring for amounts above ZMW 10,000 per transaction or ZMW 50,000 per month.
• Zimbabwe (RBZ): Financial Intelligence Unit requirements mandate real-time suspicious transaction reporting. USD transactions above $500 require enhanced due diligence.
• Botswana (NBFIRA): Financial Intelligence Act 2019 requires customer risk classification.
• Namibia (BoN): FIM Act 2021 requires merchant verification within 30 days of account activation.

What NexaPay Handles For You

• KYC verification of the end-customer at the point of transaction
• Real-time transaction monitoring and automated suspicious activity flagging
• Automated STR filing with relevant FIUs where required
• PEP and sanctions screening on all transactions

What Merchants Are Responsible For

As a merchant on NexaPay, your primary obligations are: providing accurate business registration information during onboarding, notifying NexaPay of any material changes to your business, cooperating with any compliance investigations, and maintaining your own records of goods/services sold.

"Compliance is not just a box-ticking exercise — it is the foundation that lets legitimate businesses operate without disruption." — NexaPay Compliance Team