Upload in Read Only Mode

I m uploading 100MB file to clients SFTP server, During transfer a automated tasks runs on client SFTP server that Picks up the partial uploaded file and moves it some where else. Is there a way to upload a file in read only until the transfer is done? To pervent client to not getting the partial file.
thanks

You may force transfer to temporary filename.

martin wrote:

You may force transfer to temporary filename.

I m forcing transfer to temparary filename. Our client is downloading *.* so therefore they download partial files. I was wondering if there was a way to make file un touchable while uploading by winscp..

Ok sorry.

WunSCP cannot lock the remote file for reading.