Wrong-chain guard

Pick the network you intend to use, paste the recipient address, and see whether they fit - before you send.

What it catches

Address formatted for a different chain family (e.g. a Bitcoin address on Ethereum).
EVM checksum mismatches that signal a typo.
EVM addresses with no history on your chosen network but activity elsewhere.
Contract addresses that may not accept direct transfers.
Look-alike formats that are ambiguous across chains (Sui vs Aptos).