Why the network belongs on the document
The same USDT balance can sit on TRON TRC20, Ethereum ERC20 or BNB Smart Chain BEP20, and each has its own address format and fee profile. If your invoice says only USDT, a client may send on a chain your wallet does not watch.
VegaPal keeps the network attached to the saved wallet, so it prints next to the address on the PDF and on the payment page rather than living in a separate message you forgot to send.
