Which document?
Article 41(6a) of the Polish VAT Act lists examples, so the rule is not limited to a single message name. In Poland’s AES/ECS2 PLUS, the office of export sends CC599C to the declarant after receiving results from the office of exit. Check the outcome: B1 can mean refusal to allow exit.
When does the zero rate apply?
Article 41(6) sets the document deadline for direct exports. Paragraphs 7 and 8 address the following settlement period and require a customs document confirming the export procedure. For indirect exports, paragraph 11 also requires the goods in the document to be identifiable with those supplied.
Check the actual case
Establish the country of declaration, declarant, offices of export and exit, and the transport events. The party responsible for clearance receives the relevant confirmation and passes it to the customer. CloseMRN can review port registration and available statuses.
Sources
Email the MRN and documents for review: contact@closemrn.com.