The body has released what it says is a series of email exchanges with the controversial sports scientist regarding the anti-obesity drug AOD-9604.
Channel Seven reported on Wednesday that Dank had claimed he had an email from WADA, giving him permission last year to use the drug.
Dank reportedly said the email dated back to January last year and he would be prepared to produce it in court.
WADA issued a statement last week saying AOD-9604 is a banned substance.
The drug has become a hot topic as the Australian Sports Anti-Doping Authority (ASADA) continues its investigation into supplement use last year at Essendon.
Dank ran that supplement program, but is no longer at the club.
The ABC's 7.30 said that in a February 2 email last year, Dank was seeking confirmation from WADA about AOD-9604.
WADA claims its research and prohibited listings manager Irene Mazzoni replied: "Dear Steve, as I mentioned during our telephone conversation you should contact your national anti doping organisation, in this case ASADA, as certain drug preparations may differ between countries, such seems to be the case with AOD-9604.
"Please be aware that there is a section in the prohibited list S0 - that deals with non approved substances.
"Therefore even if the substances or similar substances do not appear listed it does not automatically mean the substance is permitted."
Dank then allegedly replied: "Thank you for your reply and confirmation that the product or any related product does not appear on any prohibited list."
Mazzoni: "I could not find that it had been approved by any government or regulatory authority.
"That's why I say to contact ASADA to check its status in Australia."
Dank also queried about a number of other supplements, asking whether they were permissible for use.
Mazzoni: "Dear Steve, please address your inquiry to ASADA as they will be in a better position to assess medication sold in Australia.
"WADA only provides information to federations and anti doping organisations.
"This is why you must contact them directly."
7.30 said ASADA would not comment on any communication with Dank.
