{"section":"faq","requestedLocale":"en","requestedSlug":"erro-invalid-header-signature-ao-tentar-importar-planilha-de-frete","locale":"en","slug":"erro-invalid-header-signature-ao-tentar-importar-planilha-de-frete","path":"docs/en/faq/post-purchase/erro-invalid-header-signature-ao-tentar-importar-planilha-de-frete.md","branch":"main","content":"When uploading a freight spreadsheet, you can come across the error \"*Invalid header signature; read \\{serialNumber\\}, expected \\{serialNumber\\}*\".\n\nThis error occurs when the freight spreadsheet is imported with the __.xlsx__ extension.\n\nTo solve the problem, it is necessary to adjust the freight spreadsheet to the __.xls__ extension and [import the freight spreadsheet](/en/tutorial/importing-the-shipping-spreadsheet) again.\n\n> ⚠️ In case the spreadsheet is over 10 MB, you’ll need to compact it in .zip format. The .zip archive should have less than 10 MB. Otherwise, the upload won’t work."}