The trustee's office has significant interaction with almost every other county office and official.  The trustee's involvement as county treasurer, issuing checks and county warrants, results in day‑to‑day contact with other offices.  Also, as receiving agent for fees generated by other offices, the trustee is necessarily involved to some extent in the operation of these other county offices.  Additionally, the trustee interacts with other officials involved with the investment of idle county funds.

The trustee must interact with the county mayor and/or a finance/budget director as well as the county legislative body regarding the trustee's budget and budget amendments. The exact procedures vary from county to county depending upon whether the county operates under a charter or optional general law regarding budgeting, or has a private act dealing with this subject. However, all trustees must submit budget requests in a timely manner in the first half of each calendar year for inclusion into the county's annual budget. Most counties have budget committees that may recommend appropriations for the trustee's budget that differ from those submitted by the trustee. The county legislative body determines the amount of the trustee's budget, subject to certain restrictions, such as following the requirements of any court order regarding a salary suit for deputies or assistants. In many counties, depending upon the applicable law, the county mayor has the authority to approve line item amendments to the trustee's budget within major categories not affecting personnel, whereas major category amendments require the approval of the county legislative body. T.C.A. § 5-9-407.

The trustee also interacts with the county mayor in the selection each year of the delinquent tax attorney. The selection of the delinquent tax attorney by the trustee is subject to the approval of the county mayor. T.C.A. § 67-5-2404. The trustee interacts with the delinquent tax attorney preparing the delinquent tax lists and giving proper notice during the collection process. The trustee works with the clerk and master as well as the delinquent tax attorney regarding funds collected in delinquent tax suits.