Diagnose a service mismatch before buying another number

Published by OPEN RAMBO. The engineering patterns and pseudocode illustrate designs, not a documented product API. Numerical examples are illustrative.

Use stable service identifiers

Display names change and may be translated. Store a stable service identifier with the order, plus the displayed label at purchase time. Do not map services by substring matching; similar names can refer to different products or verification flows.

Check the destination form

Ask whether the target form accepted the international number and whether it actually offered SMS. An email challenge or authenticator prompt is not an SMS delivery failure. Use redacted error text to distinguish rejection before sending from waiting after sending.

Preserve the first order outcome

Resolve or cancel the original order according to its rules before creating more orders. Multiple overlapping numbers make it harder to identify which code belongs to which attempt. Keep the service, allocation time and target-send time in one timeline when available.

Illustrative implementation

order_context = (service_id, country_id, allocated_at)
if target_challenge != "sms":
    classify_as("different_verification_channel")

Acceptance check

Test two similarly named services and a non-SMS challenge. Neither should be silently treated as the requested SMS workflow.

Read next

• Estimate SMS cost per receipt with refunds included
• Keep SMS test traffic out of customer reliability reports