CA AB2188

Requires electronic media advertisements (graphics, images, animated content) that link to websites to display "Who funded this ad?," "Paid for by," or "Ad Paid for by" in readable font for the advertisement's duration, with exceptions if text would exceed one-third of the image.

Mandates email messages and websites include disclosure statements in at least 8-point font at the top or bottom, and video advertisements longer than 30 seconds must display disclosures at the beginning.

Requires social media advertisements to display disclosures in at least 10-point font on the profile or header photo (fully visible on all common devices), rather than on individual posts.

Establishes requirements for committees to notify online platforms when posting political advertisements and provide committee disclosure names; online platforms must display funding information adjacent to sponsored content labels or via clickable links.

Creates civil liability up to three times the advertisement cost for intentional disclosure violations, and requires online platforms to maintain and publicly display records of all advertisements from committees spending $500 or more in a 12-month period.