If your Google ad account has suspended due to Circumventing Systems Policy, your ad/campaign may have one or any of the following which are not allowed:

• Engaging in practices that circumvent or interfere with Google's advertising systems and processes, or attempts to do so.

Examples (non-exhaustive):

Cloaking (showing different content to certain users, including Google, than to other users) that aims at or results in interference with Google’s review systems, or hides or attempts to hide non-compliance with Google Ads policies, such as:
-Redirection to non-compliant content
-Using dynamic DNS to switch page or ad content
-Manipulating site content or restricting access to so many of your landing pages that it makes it difficult to meaningfully review your ad, site, or account.

Note: Cloaking does not include providing content personalization that adds genuine value for certain users, such as different language versions of the same content or different versions of the same content depending on the user’s internet service provider, as long as the offering is still substantially the same, the variation in content is still compliant with Google Ads policies, and Google is able to review a version of the content.

-Repeated policy violations across any of your accounts, including creating new domains or accounts to post ads that are similar to ads that have been disapproved (for this or any other Google Ads policy)

-Bypassing enforcement mechanisms and detection by creating variations of ads, domains, or content that have been disapproved (for this or any Google Ads policy)

-After a previous suspension decision, attempting to use the Google Ads system again by creating new accounts in order to re-enter the system

-Abusing Google Ads product features in order to show policy non-compliant content to users and/or gain additional traffic

-Submitting false information as part of Google's verification programs.

• Manipulating ad text in an attempt to bypass our automated system checks

Examples (non-exhaustive):

-Misspelling prohibited words or phrases to avoid ad disapproval; manipulating trademark terms in the ad text to avoid the restrictions associated with the use of that trademark.

In short, if you have used any redirection techniques, doorway pages, blocking landing pages with robots.txt, using copyright terms variations, creating multiple accounts for the same website, and/or using the same site which was previous suspended in Google AdWords. These may fall under this policy.

If you believe there's been an error, and that you haven’t violated this policy, submit an appeal and explain why.

Take note that Google only reinstates accounts in compelling circumstances, and when there is a good reason so it's important that you take the time to be thorough, accurate, and honest.

Violations of this policy will not lead to immediate account suspension without prior warning. A warning will be issued, at least 7 days, prior to any suspension of your account.

How To Resolve:
It’s possible to have an ad disapproved for violating this policy without having your entire account suspended.

This is most common when a word or phrase in the ad appears to be too similar to a prohibited word or a trademarked term that you aren’t authorized to advertise.

In this case, simply remove that word or phrase from your ad. Once you edit and save the ad, it will automatically be reviewed and can be approved to run if Google finds that it no longer violates this policy.