This interactive session builds on the previous presentation (Ethics in the Field. Know Thyself) and takes a deeper dive into the legal and administerial consequences that affect projects or studies when critical mistakes are made in the field, in the data analysis, or the conclusions presented in a report. We will discuss how these errors often accumulate or are compounded overtime, where they often occur, and how they should be remedied when discovered. More importantly, we will highlight methods that should be used when planning and conducting field work, how to support your conclusions, and how to prepare legally defensible documents.