If I forgot my zipcode then how to request for a new pword?

For my previous account I got an email saying my pword is changed, in fact I have not requested/changed the pword. Now I would like to request for a new pword. But I forgot the Zip code I entered while registering with Yahoo. Is there any way I could get a new pword with out ping the zip code. Or is there any way I get the details by passing any other information I had given at the registration time?