I got this in the morning today:

Greetings from Amazon Payments.

Thank you for registering with Amazon Flexible Payments Service. We're excited to have you as our customer. In order for us to process your application and activate access to Amazon FPS, we need some additional information about your organization:

1. Please provide us with the written procedures your organization follows in order to qualify charities to be listed on your website and to receive donations
2. Please provide evidence of your organization's status as a tax exempt charity with the Internal Revenue Service (if applicable)
3. Please provide information regarding the timing and amount of membership dues (if applicable)

Please fax this information to 001-206-765-3424 (outside the US) or 1-206-765-3424 (within the US). To ensure that your fax is processed in a timely manner, please be sure your fax includes the email address associated with your Amazon Payments account. We will process your application as soon as we hear from you.

Thank you for your interest in Amazon Payments.

Sincerely,

Account Specialist
Amazon Payments
https://payments.amazon.com
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According to the site, apparently I must be an US-based, IRS-certified 501(c)(3) nonprofit organization to collect donations. Unfortunately, I am not an organization.

I'm seriously worried about the tax-exempt part; me taking donations will be treated as money-laundering by the IRS and it could land me some serious fines (I didn't make enough to put me in court, at least).