If the document is rejected by the server itself, 1C does not always show the exact reason for the error — the program may simply display a general message "rejected by server" without specifying which lines or fields the system is objecting to.
How to find out the real reason
In this situation, you need to go directly to the ESF IS website and check the document status there. It is on the website that the specific reason for rejection is displayed — which data or lines failed the server check. Through 1C this level of detail may not be available, so checking through the ESF IS personal account is the most reliable way to find out exactly what did not satisfy the server.
Frequently asked questions
Why doesn't 1C show the exact error?
Because the rejection is generated on the ESF IS server side, and in such cases 1C only receives a general status without a detailed breakdown of the reason.
What to do if the reason is still unclear on the website?
In this case, you should contact ESF IS support or specialists who can analyze the specific error text from the website.
Do I need to recreate the document after viewing the error?
Yes, after finding out the reason on the website, you need to correct the specified data in the document in 1C and resend the notification.