1. Go to Forms
2. Find your donation form > hover over Settings > select PDF
3. There should be one letter for One Time Donations and another for Recurring Donations. Select the one you want to Edit.
(One-time and recurring donations are handled differently on the back end, and requires separate letters for each.)
4. Find the Template tab or scroll down to the Template section (it depends on which version of the form plugin your site has). Towards the bottom of this section, update the name and position in fields called Signatory Name and Signatory Business / Position.
5. To save, scroll down and press "Update PDF"