A Google AdWords Help thread has an advertiser who implemented a landing page that asks for credit card information in not a standard manner.
The URL itself, when a user lands on the page, is not HTTPS or SSL enabled. But there is an embedded frame within that page that is HTTPS/SSL enabled. That frame has for the credit card and other sensitive information.
Is that okay with Google's AdWords landing page policies. There is a specific SSL requirement for landing pages that capture sensitive information.
An Google AdWords technical specialist responded to the thread in this case saying this is fine. It is fine to use SSL frames if the data you are collecting goes through the HTTPS component. The technician said:
Thanks for bringing this up in the community. I consulted with the policy team and have the following update for you. Yes, the setup that you highlighted conforms to our guidelines. The advice is to implement an https page, to process the sensitive data and use a frame on simple https pages.
Forum discussion at Google AdWords Help .
Image credit to BigStockPhoto for SSL frame