Service Desk Issues

Question

We had a patron come in this past week who said that he couldn't see well and also couldn't type or use a mouse, but he needed to certify Unemployment Insurance. He asked the staff member to login with his username and password and do this for him, and the staff member was, understandably, uncomfortable doing it.

Answer

At first glance, this question seems simple: what are the possible legal risks to a librarian helping a patron fill out a legal document?

But within this question lies another, slightly more complex issue: when does good customer service become an accommodation for a disability?