Fund an order in any of four coins.
Anubis issues a fresh deposit address per order in whichever of its four coins you choose.
Hold your own coin rather than sending straight from an identity-checked exchange, because the exchange record ties your name to the deposit. Feather or Cake for Monero, Sparrow or Electrum for Bitcoin and Litecoin, a wallet you control for Ethereum. Cake carries a Bitcoin-to-Monero swap if you want to shift into the private coin first.
Open the order, copy the deposit address for your chosen coin, send from your wallet, and wait for confirmations. Keep the on-market balance sized to the order in front of you.
A fresh address per order lets the market attribute an incoming payment without you labelling anything. The corollary catches people: an address from a previous order belongs to that order, and sending to it reaches the market but not your current purchase.
A transaction is broadcast, included in a block, then buried under further blocks. Each one is a confirmation and the market waits for several. Ten minutes to an hour of nothing visible is ordinary. Check your own wallet for the confirmation count before assuming anything went wrong, because a progressing transaction means the payment exists and simply has not been credited.
Some wallets subtract the network fee from the figure you typed, so slightly less arrives than the order requires. Others add it on top. Neither is wrong and only one funds an order correctly. The shortfall is usually smaller than the rounding on the price, which is exactly why it catches careful people.
Two unmatched deposits are considerably harder to reconcile than one late one, and the second is not faster. A genuine shortfall is resolved with a support message carrying the order reference and the exact amount, not with another transaction.
Escrow protects money attached to an open order and nothing else. A balance held between orders sits in no contract and is exposed to whatever happens to the platform. Depositing close to what the order needs also avoids paying network fees repeatedly on small top ups.