Yes, you can make an online donation on behalf of a donor. 

There are two ways you can do this:

1. You would go into their profile and select Add - Donation Via Page. Once you've selected that a pop-up window will appear allowing you to select the donation page you would like to use. When you select the donation page a new tab will appear with that Donation Page.

2. Open the membership page while still logged into AssociationSphere. As an AssociationSphere user, you have the ability to search and select a constituent when entering in on the form. Please note any donor who views your form will not have this option and will need to enter in all of their information manually. You'll then search and select the constituent you are entering for. 

In either case, the constituent's information should be auto-filled into the form. If you have the donor's credit card stored in their profile it will allow you to select that card. If not you can just enter the credit card info manually. You'll then submit the donation like you normally would on this form. The Donor will be charged and a record will be created into your account.