n.背书人；转让人

The endorser shall bear liability on the bill if it is negotiated in spite of all this. 背书转让的，背书人应当承担汇票责任。

If there is any doubt about the signature, the bank will refuse to cash the checkwill return the check to the endorser. 银行对签字的真实性有怀疑，它将会拒绝兑现支票，将支票退给背书人。