Payment shock can occur on construction and on purchase loans.
Construction Example: Borrower purchases a lot for $10,000 in 2013. Seller was owner of record on January 1, 2013, and seller's taxable value was $5,000. Pretend construction proceeded with no problems and permanent financing closed in 2013. The 2013 taxes will be $500 based on seller's taxable value. On January 1, 2014, Borrower is now the owner of record and the taxable value is $240,000. November 2014 taxes will $2,400. Payment Shock will occur at next escrow analysis!
In order to be in compliance we have to set up escrow for the 2013 taxes of $500. Examiners consider it a hardship for Lender to require Borrower to pay a starting balance and monthly escrow based on $2,400 tax bill when we know or estimate the next tax bill will only be $500.
However, if Borrower gets the required Payment Shock Notice and chooses to sign a Voluntary Payment to Escrow Agreement that results in an excess, the examiners are satisfied.
Excess funds still have to be returned to Borrower and it is their choice whether or not to redeposit into Escrow account.