1 ball scorecard submission?

Very noob question which I can't find answer to:
When I play alone, can the scorecard be submitted for handicap maintenance?

According to the rules , it'll be No as the marker and player is the same marker and there isn't any witness about your actual score .

After much searching on the internet, finally found the answer from the USGA website:
http://www.usga.org/Rule-Books/Handicap-System-Manual/Decision-05/
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5-1a/2. Score Made When Playing Alone
Q: If a player plays alone, should the score be returned for handicap purposes?
A: Yes, provided the round is played in accordance with the Rules of Golf.
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5-1a/5. Status of Scores Made when Two Balls Played Throughout Round
Q: A player frequently plays alone and plays two balls throughout the round. May the player return the score made with each ball for handicap purposes?
A: No. The player may not return the score made with either ball, as such scores are not made in accordance with the Rules of Golf - see Rule 7-2 of "The Rules of Golf."
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Therefore, if follow rules, can submit scorecard even if no witnesses. Golf is really a game of integrity...