Please somebody enlighten me here.
Exchanges do not accept so-called third-party transfers when trying to fund a wallet.
can you give a bit of backstory to this statement to this sentence, what do you mean third party transfers and what exchanges do not allow them?
AFAIK, you can only fund your exchange wallet (which you do not own by the way, as you do not have the keys) by sending the coins to the address from some other address. If there should be any form of restrictions, it should be from using fiat and trying to fund your fiat wallet from the exchange using some other bank account not related to yours, of trying to withdraw in the same way.