Donate online today or mail your donation to our Animal Care Center located at 3370 Thomas Road, Santa Clara, CA. All donations are tax deductible. Donors receive an official acknowledgement from the Santa Clara County Library.What do you need to include in your donation acknowledgment letter? To make your donation, please fill out the form below. It's a great way to double your impact. A donation acknowledgment letter (sometimes called a donation receipt or thankyou letter) is an email or paper that recognizes a charitable contribution.