When servicing is transferred from one servicer to another then the "old" servicer is required to provide a short year statement.
RESPA 1024.17
(4) Short year statements. A servicer may issue a short year annual escrow account statement (“short year statement”) to change one escrow account computation year to another. By using a short year statement a servicer may adjust its production schedule or alter the escrow account computation year for the escrow account.
(i) Effect of short year statement. The short year statement shall end the “escrow account computation year” for the escrow account and establish the beginning date of the new escrow account computation year. The servicer shall deliver the short year statement to the borrower within 60 days from the end of the short year.
(ii) Short year statement upon servicing transfer. Upon the transfer of servicing, the transferor (old) servicer shall submit a short year statement to the borrower within 60 days of the effective date of transfer.
(iii) Short year statement upon loan payoff. If a borrower pays off a federally related mortgage loan during the escrow account computation year, the servicer shall submit a short year statement to the borrower within 60 days after receiving the payoff funds.