Campaigns can choose to give donors the option to increase their donation by a specified percentage to contribute towards processing fees.
A donor can then selects this option (sometimes it will be preselected) and simply donate a higher amount. The processing fees will be calculated in the total donation amount.
How to contribute to the processing fees when giving:
1. Go to campaign widget.
2. Click on your donation > donate now.
3. Add your details > proceed to payment.
4. Add your payment method and details.
5. Select "Increase my donation by % to contribute towards processing costs".
6. Click donate now.