Generally

Generally the Borrower'sBorrower'sPerson who is the obligor per the Note. monthly payment consists of P&IP&IPrincipal and interest  and deposits for insurance, taxes, replacement reserves and replacement hedges or some combination of such items.  In some instances, the payment may include additional funds to be applied toward the UPBUPBUnpaid Principal Balance  or to repay funds advanced by the ServicerServicerPrimary Person servicing the Mortgage Loan, including the originator, seller, or a third party. .  The ServicerServicerPrimary Person servicing the Mortgage Loan, including the originator, seller, or a third party. must account for each portion of the Borrower'sBorrower'sPerson who is the obligor per the Note. monthly payment in the Servicer'sServicer'sPrimary Person servicing the Mortgage Loan, including the originator, seller, or a third party. records.  The ServicerServicerPrimary Person servicing the Mortgage Loan, including the originator, seller, or a third party. must track both actual and scheduled Mortgage LoanMortgage LoanMortgage debt obligation evidenced, or when made will be evidenced, by the Loan Documents, or  a mortgage debt obligation with a Fannie Mae credit enhancement. balances (a.k.a., Security Pool and SecuritySecurityMBS, PFP MBS, or REMIC. balances) and reconcile any outstanding difference (e.g., the ServicerServicerPrimary Person servicing the Mortgage Loan, including the originator, seller, or a third party. advances for insufficient BorrowerBorrowerPerson who is the obligor per the Note. payments).