> ## Documentation Index
> Fetch the complete documentation index at: https://foliant-help.iforiti.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 發票與編號

> 為發票、折讓單和報價單編號、鎖定已開立的發票，並保存及驗證原始文件。

為您的發票、折讓單和報價單設定連續編號，並完整保留每張已開立發票寄出時的原樣，以符合許多國家的稅務規定。

## 編號

1. [設定文件編號](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/document-numbering.md)
2. [文件何時取得編號](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/when-documents-get-numbers.md)
3. [查看訂單上的文件編號](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/document-numbers-on-orders.md)

## 已鎖定的發票

4. [鎖定已開立的發票](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/locked-invoices.md)
5. [以折讓單更正發票](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/credit-notes-for-refunds.md)
6. [「已開立的發票」頁面](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/issued-invoices-page.md)
7. [驗證 PDF 與雜湊鏈](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/verify-a-pdf.md)
8. [下載封存檔及文件保存期限](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/archive-and-retention.md)
9. [將已開立的發票儲存到 Google Drive 或 Dropbox](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/cloud-archive.md)
10. [為已開立的發票加入電子發票資料（ZUGFeRD / Factur-X）](https://foliant-help.iforiti.com/zh-Hant/invoices-and-numbering/e-invoices.md)


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