R.I. Gen. Laws § 44-19-9 — Advertisement as to assumption of tax by retailer

It is unlawful for any retailer to advertise or hold out or state to the public or
to any customer, directly or indirectly, that the sales or use tax or any part of
the tax will be assumed or absorbed by the retailer or that it will not be added to
the selling price of the property sold or upon the rental charged for living quarters
in hotels, rooming houses, or tourist camps or that, if added, the tax or any part
of the tax will be refunded.