Requires municipality to return to taxpayer property taxes paid in error due to assessor's or owner's mistake.

This bill requires New Jersey municipalities to refund property tax overpayments caused by assessor errors or mistaken payments by taxpayers. It directly affects property owners who paid taxes on the wrong parcel, paid twice, or mistakenly paid another's taxes. Key provisions mandate refunds without interest for errors in assessment or payment, limit refunds to the year of notification plus three prior tax years, and require a hearing with five days' notice for disputed claims. The law makes existing optional refunds mandatory and adds a three-year statute of limitations for claims.