Donations can be validated now from Validate - Elive Linux , this page is used for the returning from paypal when a donation is made to download (so the page itself manages everything), giving the download link for each different donation, if you enter directly to the page you can also validate / check a donation (note: this may work or not work with the past donations, since it may lack some data in the database, but it may probably work so if you are curious you can test it yourself 
)
I wanted to implement this (better integrated) feature since long time. Its almost finished now (I still need to add a few more functions but it actually perfectly works)
