They will send the letter….there are several people named elvis presley in the country…
Either way, you don’t need a return address at all for it to be delivered…and if you do have on on there, they don’t look at it unless it is undeliverable or there is not enough postage on it.
Source:
http://13news.info/will-the-post-office-hold-back-a-letter-that-has-elvis-presley-as-the-senders-name/