SIGNUP AND PROMOTION ABUSE EVALUATION
Evaluate repeated signup abuse without treating similarity as identity.
Review a synthetic account-creation or promotion-eligibility interaction with evidence states, plausible shared-environment explanations, and a customer-owned response. Related-looking activity can guide investigation; it does not prove one person or one intent.
Separate repeated activity from evidence of abuse.
Interaction
Evidence
Policy
Mark the signup decision.
Input: a bounded signup or eligibility event
Inspect evidence and uncertainty.
Output: assessment context with evidence state
Apply your account and promotion rules.
Decision: owned and recorded by your application
Keep gaps visible before comparing activity.
Evidence present
A supported input contributed context.
Evidence missing
An expected input was not supplied.
Evidence unavailable
A check could not produce a result.
Shared context does not prove a shared actor.
Matching or related attributes do not prove that two accounts belong to the same person.
Walk through one signup or promotion decision.
Bring the eligibility rule, retry behavior, benign shared-environment cases, and policy owner. The walkthrough stays scoped to the workflow instead of promising an outcome before evaluation.