diff --git a/config/mainnet/README.md b/config/mainnet/README.md
index 5e23f5de..db11ce06 100644
--- a/config/mainnet/README.md
+++ b/config/mainnet/README.md
@@ -5,6 +5,10 @@ Make sure to specify correct values instead of `<...>` placeholders.
 Do not change `contracts` section. Run latest neofs-node release with
 fixed config `neofs-node -c config.yml`
 
+To use NeoFS in the Mainnet you need to deposit assets to NeoFS contract.
+The contract sript hash is `2cafa46838e8b564468ebd868dcafdd99dce6221` 
+(N3 address `NNxVrKjLsRkWsmGgmuNXLcMswtxTGaNQLk`)
+
 ## Tips
 
 Use `grpcs://` scheme in announced address if you enable TLS in grpc server.