diff --git a/EIPS/eip-137.md b/EIPS/eip-137.md
index fa8cdc1c..b28b6fd3 100644
--- a/EIPS/eip-137.md
+++ b/EIPS/eip-137.md
@@ -179,6 +179,7 @@ The following interfaces are defined:
 | `pubkey`    | 0xc8690233   | #619    |
 
 EIPs may define new interfaces to be added to this registry.
+
 ### <a name="addr"></a>Contract Address Interface
 
 Resolvers wishing to support contract address resources must provide the following function:
@@ -189,6 +190,8 @@ function addr(bytes32 node) constant returns (address);
 
 If the resolver supports `addr` lookups but the requested node does not have a record, the resolver MUST return the zero address.
 
+Clients resolving the `addr` record MUST check for a zero return value, and treat this in the same manner as a name that does not have a resolver specified - that is, refuse to send funds to or interact with the address. Failure to do this can result in users accidentally sending funds to the 0 address.
+
 Changes to an address MUST trigger the following event:
 
 ```