Every Member by default is able to make Check Requests. If the feature does not appear on their app screen, it can be enabled by an Admin via the web version of BoosterHub. Go to Settings > Admin Settings, then scroll down to the Accounting section and toggle OFF the Check Request - Admin View Only. Click the Save button at the top right of the Account section. Then also scroll up to click the Save button at the top right of the entire page. 

The member will then be able to navigate on their app to Tools > Check Request to submit a request.