Currently, the "Borrowing Activity Letter" is sent when a staff member renews items for a patron via Manage Patron Services.

This letter is often superfluous and the behavior is not ideal for libraries with "separate _ patron _ notifications _ by _ library" set to true – it ends up sending a letter from each library where the patron borrowed material.

If we had a parameter that could turn off sending it when renew selected or renew all is used, then we would turn it off and staff could elect to send it when they felt it was useful or when the patron requested it, via the More Actions menu.