Er na chynigiwyd hyn i gychwyn yn yr ymgynghoriad, mae nifer o ymatebwyr i'r ymgynghoriad, yn enwedig yr Asiantaeth Troseddu Cenedlaethol (NCA), wedi argymell y dylai ACC gael troi at bwerau penodol i ymchwilio i wyngalchu arian. Bydd y pwerau hyn yn caniatáu i ymchwilydd ariannol achrededig olrhain asedau troseddol lle mae gan ACC le rhesymol dros gredu bod troseddau ym maes trethi datganoledig a gwyngalchu arian wedi digwydd.
Although not initially proposed in the consultation, a number of respondents to the consultation, in particular the National Crime Agency, (NCA) has recommended that WRA should have recourse to use certain powers to investigate money laundering. These powers will allow an accredited financial investigator to trace criminal assets where WRA has reasonable suspicion to believe devolved tax and money laundering offences have occurred.