Contribute to "Bill Gates For Arizona" Maximum contribution $6,250 per individual per election cycle. Donate Online via PayPal Please use the "Donate' Button below to contribute securely online. Disclaimers: Contribute by personal check. Please complete and print our contribution form for mailing with your check. Download our contribution form here. Mail your personal check to: Bill Gates for Arizona P.O. Box 82485 Phoenix, AZ 85071 Disclaimers: Contributions to Gates for Arizona are not deducible for tax purposes. An individual may contribute up to $6,250 per election cycle. (Married couples may contribute up to $12,500 total.) Contributions from corporations, labor unions, and foreign nationals (non-green-card holders) are prohibited. (No business or corporate credit cards or checks.) Arizona law requires Bill Gates for Arizona’s best efforts to obtain, maintain, and report the name, address, occupation, and employer of any individual who contributes more than $50 in an election cycle.