This allows you to send a 'cheque' to your chosen charity which has on it the words 'from an anonymous donor'.
Times, Sunday Times
They held him for more than five months until an anonymous donor paid his ransom.
Christianity Today
So far, one anonymous donor has pledged 10,000 to a 'fighting fund'.
Times, Sunday Times
But she didn't have time to find an anonymous donor.
Times, Sunday Times
I haven't faced too many negative attitudes about our decision to use an anonymous donor.
Times, Sunday Times