The Transaction Receipt Date is the date this particular transaction was received by the FAFSA processing systems. If this was a paper transaction (FAFSA or SAR), this is the date the processor received the document in the mail. If this was an electronic transaction (FAFSA or Correction on the Web, or an application/correction completed electronically by the FAA) this is the date the server received the submission. In the case of Web products, it is the same date as the one on the confirmation page.
This date changes from transaction to transaction.