The Massachusetts ST-6 form is a crucial document for individuals and businesses involved in the sale of boats, recreational vehicles, or snowmobiles. This form serves as a Certificate of Payment of Sales or Use Tax, ensuring that all applicable taxes have been paid before the transfer of ownership. It is divided into two main parts: one for sales conducted by registered dealers and another for sales by individuals or entities that are not registered dealers. Each section requires specific information, including the seller's details, the buyer's information, and the tax payment confirmation. Accuracy is paramount; any discrepancies can lead to serious consequences, including the suspension of registration. The form also contains a declaration section where the undersigned certifies the truthfulness of the information provided under penalty of perjury. It's essential to understand that this claim is subject to verification by the Massachusetts Department of Revenue, emphasizing the importance of meticulous record-keeping and compliance. Failure to adhere to these requirements can not only delay the transaction but also result in penalties, making it imperative for sellers and buyers alike to complete the ST-6 form correctly and promptly.