No special form of signature is required. On this point the law of the negotiable contract seems to be the same as that of the ordinary written contract.1 It seems that a signature by mark,2 or by initials,3 or by an abbreviation,4 or by a misspelling of his name,5 or by a stamp,6 or by printed signature in facsimile,7 or by figures which indicate the party who signs the instrument,8 or by a business name,9 are each sufficient if intended as signatures. The signature by a fictitious name, under which the signer did not do business, is not sufficient to impose upon such signer a liability arising out of the instrument.10 To attempt to hold him upon the instrument is analogous to attempting to add a party to a negotiable instrument by fictitious evidence.11