diff --git a/src/interfaces/IAddressRegistry.sol b/src/interfaces/IAddressRegistry.sol
new file mode 100644
index 0000000..91f02b2
--- /dev/null
+++ b/src/interfaces/IAddressRegistry.sol
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT OR Apache-2.0
+pragma solidity >=0.8.13 <0.9.0;
+
+/// @title TIP-1022 virtual address registry interface
+/// @notice Registers master addresses and resolves virtual TIP-20 recipients to their masters
+interface IAddressRegistry {
+    /// @notice Emitted when a new virtual master is registered.
+    event MasterRegistered(bytes4 indexed masterId, address indexed masterAddress);
+
+    /// @notice The derived `masterId` is already registered.
+    error MasterIdCollision(address master);
+
+    /// @notice The caller is not a valid virtual-address master.
+    error InvalidMasterAddress();
+
+    /// @notice The registration hash does not satisfy the required 32-bit proof of work.
+    error ProofOfWorkFailed();
+
+    /// @notice The target address matches the virtual format but its master has not been registered.
+    error VirtualAddressUnregistered();
+
+    /// @notice Registers `msg.sender` as a virtual-address master.
+    function registerVirtualMaster(bytes32 salt) external returns (bytes4 masterId);
+
+    /// @notice Returns the registered master for `masterId`, or `address(0)` if it is unregistered.
+    function getMaster(bytes4 masterId) external view returns (address);
+
+    /// @notice Resolves `to` under TIP-1022 rules.
+    function resolveRecipient(address to) external view returns (address effectiveRecipient);
+
+    /// @notice Resolves a virtual address to its registered master.
+    function resolveVirtualAddress(address virtualAddr) external view returns (address master);
+
+    /// @notice Returns `true` when `addr` matches the TIP-1022 virtual address layout.
+    function isVirtualAddress(address addr) external pure returns (bool);
+
+    /// @notice Decodes a virtual address into its components.
+    function decodeVirtualAddress(address addr) external pure returns (bool isVirtual, bytes4 masterId, bytes6 userTag);
+}
diff --git a/src/interfaces/ITIP403Registry.sol b/src/interfaces/ITIP403Registry.sol
index 8c0e514..2ef8cc7 100644
--- a/src/interfaces/ITIP403Registry.sol
+++ b/src/interfaces/ITIP403Registry.sol
@@ -37,6 +37,9 @@ interface ITIP403Registry {
     /// @notice Error when policy has an invalid type
     error InvalidPolicyType();
 
+    /// @notice TIP-1022 virtual addresses cannot be used as literal policy members
+    error VirtualAddressNotAllowed();
+
     /// @notice Emitted when a policy's admin is updated
     /// @param policyId The ID of the policy that was updated
     /// @param updater The address that performed the update