Final answer:
To file an ethics complaint against another REALTOR®, one must provide evidence for any claims made to ensure a fair and objective evaluation. Withholding information or avoiding confrontation should be avoided.
Step-by-step explanation:
When Leo is filing an ethics complaint against fellow REALTOR® Kate, he must remember to Provide evidence for claims. As part of the professional standards process within real estate organizations, it's crucial that any allegations of misconduct are supported by factual information and documentation. This ensures a fair and objective evaluation of the complaint. Leo should not engage a legal representative immediately as this is not always necessary in the initial stages of an ethics complaint within a realtor's association. Moreover, withholding pertinent information or avoiding confrontation are not recommended practices as they could undermine the integrity of the process and lead to a resolution that is not equitable.