The effective management of trans-frontier movements depends largely on the implementation of border management policies, bilateral agreements, immigration regulations, customs procedures, and security cooperation between neighbouring states. This study seeks evaluate the implication of border management policies along the Cameroon-Nigeria border in Donga-Mantung Division. It assesses the level of awareness and effectiveness of existing border management policies, and implications of policy implementation gaps. Questionnaires was the key instrument of data collection. The study used data on primary and secondary data sources with descriptive and analytical models. The purposive sampling technique was used in selecting the border settlements and with 520 participants. These stakeholders were the different categories of migrants and border officials from the different border agencies. The study was lensed through “the bottom-top and top-bottom theory”. In summarizing the data into frequencies and percentages, Statistical Package for Social Sciences (SPSS version 21) was also used. Tables, figures were used in presenting the data. The paper found that (39.4%) of migration stakeholders have low level of awareness of border management policies and 58.6% of respondents opined low level of implementation of existing along the Cameroon-Nigeria border in DMD. The findings indicate that irregular/unauthorized border crossing is the most prominent implication of low level of border management policies awareness and implementation, reported by 259 respondents (49.8%). This is followed by smuggling and illicit cross-border trade, with 121 respondents (23.3%), and cross-border insecurity/crime, reported by 92 respondents (17.7%). Only 47 respondents (9.2%) identified loss of government revenue and constraints on local development. The paper recommended among others improving institutional coordination, enhancing public awareness of border regulations, modernizing customs and immigration procedures, deploy more border officials, improve on border infrastructures, and promoting secure and orderly cross-border mobility.