To prevent evasion of the TCPA's call prohibitions, the FCC has treated calls made by a third party on behalf of a company as if the company itself made the call, whether in relation to collection or solicitation calls subject to § 227(b) or in rules governing solicitation calls addressed in § 227(c). With respect to collection calls under § 227(b)(1)(A)(iii) made to wireless numbers, the FCC explained: To ensure that creditors and debt collectors call only those consumers who have consented to receive autodialed and prerecorded message calls, we conclude that the creditor should be responsible for demonstrating that the consumer provided prior express consent. The creditors are in the best position to have records kept in the usual course of business showing such consent, such as purchase agreements, sales slips, and credit applications. . . .