Hey team,
From the conversations above, just wanted to clarify something.
1) When we hit the bulk upload API, lets assume we pass 100 IDs and in the response it returns me an error list with 34 IDs (error_status of the IDs might be unknown_ID or BAD_COOKIE) so can we assume that rest of the 66 IDs were successful and are accepted ? also is there any portal or dashboard or an API where i can see these successful IDs ?
2) The IDs which has been returned as BAD_COOKIES (initially sent with the user_id_type as ANDROID_ADVERTISING_ID) when the same ID is retried with user_id_type as IDFA the response was still BAD_COOKIES, is there a way to know which is the correct user_id_type to be passed for the IDs to be successful ?
3) Even when using the GENERIC_DEVICE_ID as the user_id_type i am getting the errors as BAD_COOKIE, as per documentation GENERIC_DEVICE_ID is "Allows partner uploads without needing to select a specific, pre-existing Device ID type" - So UNKNOWN_ID can be possible. if i am getting BAD_COOKIE as an error is there something else i have to send in the request ?
Thanks 
Bharath Maroli