This study considered treasury single account compliance as an accounting practice for effective and sustainability in institutions. The general objective is on how treasury single account could plug leakages within the system, while the specific objective would be on how treasury single account could dovetail into a transparent reportage in a system. Legitimacy theory and public finance management theory adopted for the treasury single account, therefore foresees that government will implement policies to guarantee the society and that agencies are complying by disclosing all transactions in treasury single account. This study was based on the data from both primary source and empirical works of previous researchers. The questionnaires were administered to the bursary staff of The Polytechnic in Ibadan. The questions were on the five-point Likert type questions, with a choice of strongly agree to strongly disagree. The data gathered were analyzed using chi-square statistical packages for social sciences. Data were gathered from the questionnaires analyzed using chi-square in SPSS, and findings revealed that treasury single account compliance have a significant effect in the effective accounting practices and sustainability in institution. This paper concluded that loss of revenue has a multitude of collision on effects, including the fact that lower revenue means that less money will be available to provide facilities for sustainability. Therefore, this paper recommends that, the effectiveness of treasury single account compliance (TSAC) should be broadminded for the sustainability in institutions. There should be seal for both transparency and accountability to block the leakages within the system. The permissible laws should be appraised and adapted where mandatory training should be offered to appropriate bursary staff of The Polytechnic Ibadan to guarantee effective operation.

This paper investigated on the institutionalization of the internal control system in service companies in Lagos State. The objective is to understanding if organization wide processes put in place to guide against regulatory infractions are monitored; to determine the effect of the control environment in safeguarding organizational unit operation; effectiveness of control activities in mitigating against financial irregularities in the organization; to determine the effectiveness of information and communication to safeguard the organization against fraud, and evaluate if the risk assessment system implemented in the processes of the organization is not sufficient according to the regulatory requirement to checkmate and prevent financial irregularities. The primary data were questionnaire administered to two hundred and fifty (250) respondents selected service companies in Lagos State while secondary data were from the internet, journals and textbooks. Self-designed questionnaires were used to collect data and were analyzed using simple percentage, and bar chart. Therefore, the findings recorded that the performance of any organization cannot do without internal control as true and fair presentation of financial statement may never be possible if the board and senior management are not committed to providing a well-planned internal control system. It was Recommended that management should ensure that there are adequate organizational controls and that each staff knows his duties and equally ensures effective segregation of duties to reduce interference in terms of funds, assets management and controls and the auditor's work is to make a critical review of the internal control in order to decide the extent of examination of the available evidence which is necessary.