High turnover makes the end of an assignment an operational process
For an ordinary employer, a departure is an occasional event handled by whoever is around. For a staffing agency with a large contingent book, assignments end every single day, and Georgia expects employers to provide a separation notice to departing workers through a process administered by the Department of Labor.
Confirm your own obligations with that department and your own counsel. Operationally the point is that anything happening daily needs to be a checklist rather than a habit, because habits vary by branch and by who is on shift. Attaching the closing steps to the assignment end record, with the system recording what was issued and when, converts a recurring compliance chore into something that simply happens.
It also protects the relationship with the worker
A worker whose assignment ended cleanly, with the paperwork handled properly and a conversation about what is next, is a worker who answers the phone in three weeks. One who was left to work it out is not, and in a market with this many agencies competing for the same people that is an expensive difference.