1. 函开
1. 此更正电是信用证不可分割的一部分，只要先于函开的原证到达通知行，即可有效。
This message of modification, as an integral part of the credit, is valid provided that it reaches the advising bank prior to the arrival of mailed L/C.
2. 此更正电只要在受益人收到函开的原证前到达通知行，由通知行与原证一起向受益人通知，即可有效。
This message of modification is valid provided that it reaches the advising bank prior to the arrival of mailed L/C, and is advised the beneficiary together with the mailed L/C by the advising bank.
3. 函开什么意思
3. 开证行发出函开信用证越日发现L/C有缮打错误，立即向通知行补发电文（SWIFT MT799）更正。
An issuing bank finds typing error on the next day of dispatching a mailed L/C, and sends out a SWIFT message in MT799 to the advising bank to modify it.