Not allowed: faking your position, automating claims, running many accounts or wallets as one person, interfering with the API, or reusing a photo. The server checks your position, your device, your car and its cooldown, and, when it asks, a photo of the pump taken on the spot. It refuses a claim that does not pass.
A refusal costs you nothing and comes with a reason code, never the threshold. If you think a refusal was wrong, email support@fillgas.xyz and a person reviews it within 72 hours. Deliberate fraud means your claims are suspended; tokens already paid are not taken back, because they cannot be.