System and method for bridging between inter-object communication interfaces, such as RMI and IIOP, may include in one embodiment a bridge mechanism that maintains a cache of reference objects. The key used for hashing in the cache may be based on the object identifier (OID) of the reference objects. In one embodiment, the integer value of the OID is generated and then converted to a string for use in caching the object. In one embodiment, objects are not marked for deletion from the cache until a client calls a remove method. In one embodiment, object references in the cache include a reference to an exported object. In one embodiment, unexport of the exported object is performed by a post-invoke mechanism of the bridge mechanism after the remove method has completed.