Hello, Yes, you are correct. OfflineConversionError.CONVERSION_PRECEDES_CLICK <https://developers.google.com/adwords/api/docs/reference/v201509/OfflineConversionFeedService.OfflineConversionError#reason> error occurs when the conversion is reported to have happened before the click. You can look up the time zone of a customer using the CustomerService <https://developers.google.com/adwords/api/docs/reference/v201502/CustomerService>. The Customer object has a dateTimeZone <https://developers.google.com/adwords/api/docs/reference/v201502/CustomerService.Customer#dateTimeZone> field which includes this information. You can compensate for this by either converting your times to customer time zone (to match the API). e.g. Let's say that your account is set up to use Eastern time. A user clicks an ad at 6:00 Eastern time, and the time of the GCLID is recorded as 6:00. Your servers, in Pacific time, record the page hit at 3:00 (due to the 3-hour difference). The user finishes converting by 4:00 Pacific time (7:00 Eastern time). When you upload the conversion, if you just say 4:00, you will get a CONVERSION_PRECEDES_CLICK error.
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