Let's see what is L/C ?!

 letter of credit is a document issued mostly by a financial institution which usually provides an irrevocable payment undertaking (it can also be revocable, confirmed, unconfirmed, transferable or others e.g. back to back: revolving but is most commonly irrevocable/confirmed) to a beneficiary against complying documents as stated in the Letter of Credit. Letter of Credit is abbreviated as an LC or L/C, and often is referred to as a documentary credit, abbreviated as DC or D/C, documentary letter of credit, or simply as credit (as in the UCP 500 and UCP 600). Once the beneficiary or a presenting bank acting on its behalf, presents to the issuing bank or confirming bank, if any, on or before the expiry date of the LC, documents complying with the terms and conditions of the LC, the applicable UCP and international standard banking practice, the issuing bank or confirming bank, if any, is obliged to honour irrespective of any instructions from the applicant to the contrary. In other words, the obligation to honour (usually payment) is shifted from the applicant to the issuing bank or confirming bank, if any. Non-banks can also issue letters of credit, however beneficiaries must balance the potential risk of payment default.

1.Brief introduction

2.Terminology of Letter of Credit

3.How does L/C work?

4.Legal principles governing documentary credits

5.Legal Basis for Letters of Credit

thanks anyway,since I can't know well