Companies may use collection letters as the only means of communication when they attempt to collect past due invoices. Some might use them as a supplement to collection calls. The collection ...

The University of Dayton will use all reasonable and customary means to collect past due balances on student accounts. This includes but is not limited to: phone calls from Office of Student Accounts ...

Send a certified letter ... collection agency the rental agreement, documentation of your communication and collection attempts, and a breakdown of the number of months the tenants are past due.