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Separating OTP and Order Notification Ownership Improves Seller Login Security

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A governance framework for marketplace platforms recommends assigning login OTP templates exclusively to authentication teams, while keeping order notification templates under marketplace team ownership. The approach prevents accidental data crossover — such as seller-supplied product titles leaking into login codes — by enforcing strict template ownership rules in code. Rather than ranking SMS over email universally, the framework advises basing channel selection on which contact detail is already verified for a given seller account. Deliverability metrics like email opens or SMS transport states are flagged as unreliable success signals; only a confirmed verified-code event constitutes a meaningful outcome. The article also cautions that neither SMS nor email OTPs are phishing-resistant, recommending cryptographic authenticators when stronger security is required.

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