Relayion
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Fintech

Payment & transaction alerts

Businesses that process payments already send receipts by email. SMS reaches customers immediately at the moment the transaction occurs, from a number that feels like it came from the business rather than a payment processor.

SMS · OUTBOUND
Payment of $142.00 received. Ref #TXN-8821. Questions? Reply or call us.
✓ Delivered

A payment confirmation by email arrives when the customer is back at their desk. An SMS arrives the moment the transaction clears, while the customer is still at the point of sale. That immediacy matters for trust, especially for first-time buyers who are waiting for a signal that the transaction succeeded.

When a payment is processed, your system sends an outbound message with the customer's number, the confirmation text, and the device ID of your business phone. Relayion dispatches the message. The customer receives it from a number they can actually reply to if they have a question about the charge.

Inbound replies arrive at your webhook automatically. Dispute queries, callback requests, and questions about the reference number all come through the same channel. Your system can route them to a support queue or trigger an automated response. No separate inbound number required.

Per-message billing from traditional SMS providers scales against you as transaction volume grows. Relayion charges a flat monthly platform fee up to your plan limit. At high transaction volume the cost difference becomes significant.

Send a payment confirmation
POST /api/v1/outbound HTTP/1.1
Authorization: Bearer rlyn_bfb4d3c9…
{
"recipientNumber": "+1 415 555 0188",
"body": "Payment of $142.00 received.
Ref #TXN-8821. Questions? Reply to this message."
}
// Response
{ "success": true, "data": { "id": "msg_…", "status": "DISPATCHED" } }
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