In the absence plan of type Donation - How does the recipient know who has donated the absence hours

Hi,

In the absence plan of type Donation, the employee who donates the absence can see in the details that they donated X amount to X employee but the one who receives the donation - can they see who donated the absence hours to them?

Also, is there a way to stop an employee from donating the absence hours if their current balance is below a certain number (for instance 100 hours)?

Would appreciate any help on the above two issues.

Thank you