After opening the new SeamPay app, click on the Hub tab and then the Donations button. In the Donations screen, you can click on the option at the top for “Manage fundraisers”.
Select the fundraiser to withdraw from
Tap on Transfer money to transfer all available money to your SeamPay balance
There isn’t a fee to create a fundraiser, but SeamPay charges transaction fees for processing the withdrawal of funds received for a fundraiser.