On 
January 31, 2020, the 
AdWords API and 
Google Ads scripts will start returning 
UNKNOWN for 
AdFormat in the 
Geo Performance Report. All other reports with AdFormat will not be affected. The 
Google Ads API is not affected as the field does not exist.
Please update your code where it uses these fields:
  | AdWords API | Google Ads API | Google Ads scripts | 
  | AdFormat in GEO_PERFORMANCE_REPORT | NOT AFFECTED | AdFormat in GEO_PERFORMANCE_REPORT | 
If you have any questions while updating your code, please reach out to us on our Google Ads API and AdWords API 
forum or our Google Ads scripts 
forum.
 Nadine Wang, Google Ads API Team
 Nadine Wang, Google Ads API Team