NY Lien L § 201 (2021)
2021 New York Laws LIE - Lien Article 9 - Enforcement of Liens on Personal Property 201 - Notice of Sale.

§ 201. Notice of sale. Before such sale is held the lienor shall serve   a  notice  upon the owner with due diligence within such county, if such   owner can be found where such lien arose, if not then to the person  for   whose  account  the  same is then held personally, provided such service   can be made with due diligence within the county where such lien  arose,   but  if  such  owner or person cannot with due diligence be found within   such county, or if the property affected, other than a  security,  is  a   motor  vehicle  that  is  to  be  sold  pursuant to subdivision three of   section two hundred two of this article of a value  of  less  than  five   hundred  dollars  or  other property that is of a value of less than one   hundred dollars, then such notice shall be served by mailing it  to  the   owner  at  his  last  known  place  of  residence,  or to his last known   post-office address or if the owner's place of residence or  post-office   address  is not known, then to the last known place of residence or last   known post-office address of the person for whose account  the  same  is   then  held  personally. Any notice permitted herein to be served by mail   shall be sent by  certified  mail,  return  receipt  requested,  and  by   first-class mail. A like notice shall be served in the same way upon any   person  who  shall have given to the lienor notice of an interest in the   property subject to the lien and upon any person  who  has  perfected  a   security  interest  in  the  property  by  filing  a financing statement   pursuant to the provisions of the uniform  commercial  code  or  who  is   listed  as  lienholder  upon  the  certificate  of title of the property   pursuant to the provisions of the vehicle and traffic law.  Such  notice   shall contain a statement of the following facts:1. The nature of the debt or the agreement under which the lien arose,   with an itemized statement of the claim and the time when due;2. A brief description of the personal property against which the lien   exists;3. The estimated value of such property;4. The amount of such lien, at the date of the notice.It  shall also require such owner or any such person to pay the amount   of such lien, on or before a day mentioned therein, not  less  than  ten   days  from  the service thereof, and shall state the time when and place   where such property will be sold, if such amount is  not  paid;  and  it   shall  state  that  the  owner or any such person is entitled to bring a   proceeding under section two hundred one-a of this  article  within  ten   days of the service of notice if he disputes the validity of the lien or   the amount claimed. If the agreement on which the lien is based provides   for  the  continuous  care  of  property  the lienor is also entitled to   receive all sums which may accrue under the agreement, subsequent to the   notice and prior to payment or a sale of the property;  and  the  notice   shall  contain  a  statement  that such additional sum is demanded. Such   notice shall be verified by the lienor to the effect that the lien  upon   such property is valid, that the debt upon which such lien is founded is   due  and  has not been paid and that the facts stated in such notice are   true to the best of his knowledge and belief.