特殊用法accommodation indorsement1.通融背书conditional indorsement1.有条件背书general indorsement1.无记名[空白式]背书irregular indorsement1.非正式签注[背书]procuration indorsement1.代签, 代理背书special indorsement1.特别背书[完全背书](即记名或抬头背书)indorsement in blank1.空白背书