(A) When tangible personal property is purchased for use or consumption in this State and delivery is made in this State, such sale is subject to the use tax if the order for future delivery is sent by the purchaser directly to the seller at a point outside this State, and the property is shipped into this State from a point outside this State directly to the purchaser or the purchaser's designee, provided there is no participation whatever in the transaction by any local branch, office, outlet or other place of business of the retailer or by any agent or representative of the retailer having any connection with such branch, office, outlet, or other place of business. The term "other place of business" as used herein includes, but is not limited to, the homes of district managers, service representatives, and other resident employees, who perform substantial services in relation to the seller's functions in this State. The purchaser is liable for the use tax on the purchases outlined above in this subsection (117.334.2(A)) until the tax is paid to the State. In addition, a receipt, that shows the South Carolina tax, from a seller who is registered with the Department of Revenue to collect and remit the tax will relieve the purchaser of the liability for the tax on the purchase. However, a seller who is registered with the Department of Revenue to collect and remit the tax has a debt to the State for the use tax required to be collected under the law. If the purchaser is not relieved from his liability for the use tax as stated above, then the Department may assess the purchaser or the seller for the use tax.