Incwadi Yesikweletu (LC noma L/C) idokhumenti yasebhange evame ukukhishwa ngesicelo somthengi, ethembisa umthengisi ukuthi uzokhokha uma izimo ezithile zihlangatshezwana nazo. Lezi zimo ngokuvamile zihlobene nokuhlinzekwa kwemibhalo ethile ngokuhambisana nemibandela encwadini. Leli thuluzi livame ukuqashwa ekuhwebeni kwamazwe ngamazwe ukuze kuncishiswe ubungozi phakathi komthengisi nomthengi, ikakhulukazi ngenxa yegebe lesikhathi elikhulu phakathi kokuqedwa kwesivumelwano nokwamukelwa kwangempela kwezimpahla.
Ezimeni lapho umthengi engakwazi ukukhokha, ibhange, noma inkampani yezezimali ehilelekile ekuxhaseni ngezimali kwezohwebo, ithatha umthwalo wemfanelo wokukhokha inani, ngaleyo ndlela iqinisekise ukuphepha komdayisi. Ibhange noma inkampani exhasa ngezimali izobe isibuyisela imali kumthengi ngokwemibandela yokukhokha. Izincwadi zezikweletu zingaba namafomu ahlukene futhi zingaphansi kwemibandela ehlukene ukuze zifeze izinjongo ezihlukahlukene.
