Any individual receiving benefits under the Act in his or her own
right, or as a representative payee, or as the duly appointed agent for
the estate of a deceased beneficiary, shall execute receipts for
benefits paid by any operator which shall be produced by such operator
for inspection whenever the district director requires. A canceled
check shall be considered adequate receipt of payment for purposes of
this section. No operator or carrier shall be required to retain
receipts for payments made for more than 5 years after the date on
which such receipt was executed.