"To protect against impostors or confusion" (xrpl.org) anyone doing business on the XRPL should verify their domain and XRP Ledger address using xrp-ledger.toml file.
Steps: 1. Create a file called xrp-ledger.toml (see example after steps) 2. Create a directory called .well-known at the root of your domain 3. Upload the xrp-ledger.toml file to the .well-known directory 4. Verify the file is accessible at https://yourdomain.com/.well-known/xrp-ledger.toml (If it is not accessable, you may need to add a cors header to your web server) 5. Login to XRPToolKit and add yourdomain.com to your domain field (Under Account -> Properties) 6. Test by entering either your NFT issuer wallet or NFToken ID into this site