You can sometimes, but you are more likely to get an autograph
if you send a SASE.
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SASE - Self-Adrdessed Stamped Envelope. By this process the
receiver easily reply you. In UK it is SAE - Self Adressed
Envelope.
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Scientific Association of Surveying Engineering
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Self-Addressed Stamped Envelope
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The abbreviation SASE means 'Self Addressed stamped Envelope'.
This is when you mail someone a letter and you want a response sent
back so you include an envelope with a stamp on it and your
address.