Newbie Mgr -- you were correct. I have since received a response from the State Comptroller's Office ... and here it is ... (with a twist) ...
The Payee is the owner on cashiers checks. Unclaimed property is based on last known contact with owner (e.g., Payee), so having lost contact with the Purchaser would not change the dormancy requirements.
If the bank establishes contact with the Payee, then it would not be reportable. Generally, it is reportable only when contact has been lost with the Payee for the required dormancy period.
However, we do honor a claim from a Purchaser under one of two conditions:
1. the Purchaser is still in possession of the check
2. the Purchaser obtains a release from the Payee, stating the funds are not owed to the Payee (e.g. paid with another check, the sale fell through, etc.)
If you determine in the course of your research that the Purchaser is simply holding the check, it is still reportable to the Comptroller in the name of the Payee, without question, after the three year abandonment period has run.