We utilize another FI (ABC Bank) to facilitate currency services (cash deposits, currency/coin orders) we provide to our customers. Until recently, they accepted cash deposits on behalf of our customers delivered directly to their vault by an ACS (privately contracted by our customer). ABC Bank recently implemented a change whereby they will no longer accept deposits on behalf of our customers. In response, the workflow has changed as follows:
-Our customer's ACS picks up cash from their business location and delivers the cash to our ACS who counts and re-packages the currency.
-Our ACS, as an intermediary in the transaction, delivers the cash to ABC Bank who credits our FI.
-Upon being credited, our FI then credits our customer.

For purposes of completing the CTR for cash deposits exceeding the threshold, would a Part I be completed on the ACS privately contracted by our customer since the transaction originated with them and/or would the Armored Car box (Item 24) be checked since our own ACS is also involved?