As the title says, and it will save you server resources spinning up people guilds just to donate some random stuff they found and leave. It will also encourage people to donate, especially on smaller guilds, because then they don't need to wait half day for the map to load.
Guild: The Imaginary Friends
If you disagree with me: My opinions are my own and do not reflect on my guild and friends.
If you agree with me: My opinions are totally the guild official policy !