"If you do not register your charitable organization, including providing accurate bank account information for an electronic transfer, the AmazonSmile Foundation will still track and store donations earned in each calendar quarter. Once you’ve registered your charitable organization, your organization will be eligible to receive in the next donation cycle all donation amounts that were previously allocated to your organization and were not subject to reallocation under the Participation Agreement."

but

"Please note that donations that have been allocated to an unregistered charitable organization from customers that made their first supporting purchase more than eight full quarters ago and have not been distributed will be reallocated to other registered charitable organizations."