Which of the following is a requirement for mobile home dealers when completing a sale?

The correct requirement for mobile home dealers when completing a sale is that the dealer must complete all necessary disclosures as required. This is crucial as it ensures that all parties involved in the transaction are informed about important aspects of the mobile home, such as its condition, history, and any potential issues that may affect ownership or use. Compliance with disclosure requirements protects the buyer and ensures transparency in the sales process, which is essential for maintaining trust within the industry and adhering to state regulations.

While other options may seem relevant, they do not align with the standard legal obligations established for mobile home dealers. For instance, there is no legal mandate that requires dealers to publicly publish the sale price or to record the sale in the county clerk's office as standard practice. Additionally, while written authorizations could be a part of some business processes, they are not universally required for all sales transactions. The emphasis on completing necessary disclosures highlights the dealer's responsibility to inform buyers comprehensively, thereby supporting consumer protection laws in California.