We all know that you may not use an unauthorized trademark in your ad copy. You CAN use trademark terms in your keyword list, however. But, when doing this, be very careful not to use Dynamic Keyword Insertion (DKI) for that ad group. You may accidentally get a trademark pulling through and get an angry competitor, disapproved ads, or worse – a suspended account.
Loopholes you ask?
*You CAN use the trademark term in your display URL. Use with caution and do not abuse!
*Are you a reseller? For example, you sell iPhone accessories in your online store? Then you ARE eligible to use the trademark term in your ad copy. Be sure that your landing page clearly states and shows that you are a reseller. Do not trick the user into believing that you are the trademark holder!