Hypothetical Case

Imagine a situation like this:
For a reason, you are presumed to be dead by the whole inhabitants of the Earth other than a plastic surgeon who totally changed your appearance and voice. The said plastic surgeon happened to be dead due to a heart attack right after your surgery is done. At the same time, due to your 'death', all your identification documents have been destroyed. Assuming that you managed to forge all new documents and get a believable identity, do you think you can convinced your loved ones that you are you? An additional condition: somehow you cant say directly that you are you...

PS: No significant reason why I asked this thing... I am just wondering about this ya know...