Dear Sir/ Madam

I'm very happy to have received a donation of one million dong from your organization some days ago. I think the money will help us to build our school library. We will certainly issue the receipt as soon as possible we can.

I would like to express our thanks for the donation from your organization and hope to get more assistance and co-operation from yours in the future.

I look forward to hearing from you soon.

Yours faithfully.