Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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therefore , you should make whatever investigation you feel is necessary or appropriate before proceeding with any transaction with any third party to determine whether a charge will be incurred . 

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. OPTIONS: ["None", "Choice of law", "Arbitration", "Unilateral termination", "Jurisdiction", "Contract by using", "Limitation of liability", "Content removal", "Unilateral change"].