The author needs to pay a certain fee to issue a certificate of retrieval and inclusion. This fee is usually not high, and most of it can be done for tens of dollars. The author needs to carefully check whether the number of copies is correct, whether there are omissions, and whether the signature and seal are complete. , and all need to be checked to ensure that the certificate can play its due role.

Matters needing attention

The code usually used to represent the SCI retrieval number is the WOS entry number or the IDS number. If there are, the units that can issue retrieval certificates are generally key university libraries and units with the qualification of novelty retrieval station of the Ministry of Education.

Generally, these units have special mailboxes to receive and send emails with retrieval certificates. The author needs to send specific requirements to the units, such as whether each article is sent separately or together, whether it is sent by region or by influencing factors, and how many to send.