Do you have to tell the state you sold it?
10 days — and a fine if you do not
Hawaii fines the seller for not filing. HRS § 286-52: every person other than a dealer, on transferring a motor vehicle by sale, lease or otherwise, shall WITHIN TEN DAYS give notice of the transfer to the director of finance on the official form — and anyone who violates it shall be fined not more than $100. Hawaii County says: “Seller will not be released from liability until this notice is recorded.” The law says otherwise: HRS § 286-52(k) relieves you of liability as the registered owner once you have given the notice and handed the buyer the title you signed. Under § 286-52(o), a copy of the filed form is proof of filing, so keep one. The notice must carry the new owner's name and address, the date of sale and the vehicle description. The form is attached to the title; if it has already been detached, download your county's form. Honolulu's is CS-L(MVR)53; the other counties publish their own.
Source: HRS § 286-52; Hawaii County VRL, Notice of Transfer