Qualified endorsement. Some qualified endorsements stipulate that a bill of exchange is only delivered once, and the transferee can only use the bill himself without the right to transfer it again. If the endorser signs the back of the bill, indicating "only ××× (name of the endorsee)" or "payment to ××× (name of the endorsee) is not transferable". Others give some additional conditions, "when xxx, pay xxx (endorser's name)." When the conditions are met, the endorsement is established. Some endorsers declare that the holder can only deposit the bill in the bank and cannot use it for other purposes.
Specific endorsement. Also known as registered endorsement, this endorsement not only has the transferor's signature, but also indicates who the transferee is, but it does not have the words "only paid" and "non-negotiable". If the endorser signs on the back of the bill, it should be marked "payable to ××× (name of the endorsee) designated person" and so on. Bills so endorsed can be paid by endorsement for many times in a row, transferred for many times, and even transferred indefinitely in the market.
Blank endorsement. Also known as bearer endorsement, that is, the endorser only signs the bill and does not write it to someone, that is, there is no endorsee. A bill of exchange endorsed in blank is transferred by delivery. That is, after the first transferor with blank endorsement has endorsed and signed, it can circulate in the market for many times until the last beneficiary, and it is not necessary to indicate other transferor and transferee in the circulation process on the back of the bill.
Qualification appraisal. The endorser wrote "no recourse" when endorsing, so when the drawer is unable to pay, the endorser has no obligation to pay. Usually an agent, representative or similar person signs this type of endorsement.