中文：

捐款发票是一种重要的财务凭证，它具有多种用途。首先，捐款发票可以作为捐款人向慈善机构或其它非营利组织捐款的证明。这对于捐款人来说非常重要，因为它不仅可以证明他们所做的贡献，还可以在税收方面给他们带来一些好处。例如，根据中国税法，向慈善机构捐款可以在计算个人所得税时予以税前扣除。

其次，捐款发票也可以作为慈善机构或非营利组织收到捐款的证明。这对于接收捐款的机构来说非常重要，因为它证明他们收到了捐款，并且可以用于记录和报告捐款金额，以便于管理和监督。

此外，捐款发票还可以作为社会监督的依据。公众可以通过查看慈善机构或非营利组织的捐款发票来了解捐款的使用情况，从而对机构的资金使用进行监督和评估。这有助于提高资金使用的透明度，增强公众对机构的信任和支持。

总的来说，捐款发票是一种重要的财务工具，它不仅可以帮助捐款人记录和证明他们的捐款，还可以帮助接收捐款的机构管理资金并保持透明度。同时，它也是社会监督的重要依据之一。

英文：

Donation发票 is an important financial document with multiple uses. Firstly, donation invoices serve as proof that donors have contributed to charitable or other non-profit organizations. This is very important for donors, as it not only proves their contribution, but also brings them some tax benefits. For example, according to Chinese tax law, donations to charitable organizations can be deducted from taxable income when calculating personal income tax.

Secondly, donation invoices can also serve as proof that charitable or non-profit organizations have received donations. This is very important for the recipient organizations, as it proves that they have received the donation and can be used for recording and reporting the amount of the donation, facilitating management and supervision.

In addition, donation invoices can also be used as a basis for social supervision. The public can view the donation invoices of charitable or non-profit organizations to understand the use of donations, thereby monitoring and evaluating the use of funds by the organizations. This helps to improve the transparency of fund use, enhance public trust in and support for the organizations.

Overall, donation invoices are important financial tools that not only help donors record and prove their donations, but also assist recipient organizations in fund management and maintaining transparency. Meanwhile, it is also one of the important bases for social supervision.