ITINERIS, the company that run the Jersey Lifts app, has written an open letter to States of Jersey Police (SOJP).
It comes after SOJP released leaflets about lift-sharing in November 2017.
ITINERIS say that the information printed on the leaflet is "inaccurate and misleading".
In their open letter, the company also claims the SOJP may be in breach of the island's Data Protection laws if they pass on details of drivers to insurance companies and recommend their cover be withdrawn, as stated in the leaflets.
SOJP have responded to the letter from ITINERIS to re-iterate that genuine lift-shares are not illegal under Jersey Law. They say they are concerned about lift-shares which make a profit and become 'unregulated transport'.
According to SOJP, drivers are at risk of prosecution for insurance offences and operating a vehicle without the correct license.
Since November, around thirty letters have been issued to drivers and passengers suspected to be operating beyond a genuine lift-share.
SOJP say they will make arrangements to meet with ITINERIS to discuss their letter.