FL H1303

Creates section 559.951 in Florida Statutes to regulate "posttransaction third-party sellers" who solicit purchases through initial merchants after a consumer initiates an online transaction.

Prohibits posttransaction third-party sellers from charging consumers unless they: (a) disclose all material terms including product description, cost, and processing details; (b) obtain express informed consent through an affirmative action like clicking a confirmation button; and (c) send written confirmation notice via mail or email.

Requires confirmation notices to include the good or service purchased, charge amount and frequency, cancellation and refund policy, seller contact information, and clear statements that the third-party seller is unaffiliated with the initial merchant.

Prohibits initial merchants from sharing consumer billing information with posttransaction third-party sellers and requires third-party sellers to provide consumers a simple cancellation mechanism and limits vendor code changes to once per year with written notice.

Classifies violations as unfair or deceptive trade practices subject to penalties and remedies under Florida's consumer protection laws; effective October 1, 2011.