One-Time Password verification — a security step where a customer receives a unique code via SMS or email to verify their identity before approving an estimate or completing a sensitive action.
OTP verification ensures that estimate approvals come from the actual customer, not from a third party who forwarded the link. It creates a verified, timestamped record of acceptance that protects both contractor and customer.
"Before approving the $3,200 holiday lighting estimate, the customer entered a 6-digit code from their phone. The approval was timestamped and stored."
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