I am not accusing. But it is nonsensical to buy a postal service money order for $1. At least to me. And I can understand how the Postmaster General would issue memorandum to red ink the MO so that it cannot be misused. I am on the emails from the OCC and occasionally there is a warning/alert about falsified MO's.
For further information buy a $5, $10 and $25 MO. Tell us if they get the same stamp as the $1 MO.