请教信用证的要求的发票份数急

INVOICES MADE OUT IN THE NAME OF BUYER S IN 3 ORIGINALS，1 OF WHICH SHOULD BE CERTIFIED BY C.C.P.I.T，PLUS 3 EXTRA COPIES，请教这里说的发票正本几份，C.C.P.I.T认证的几份，副本又是几份，急

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发票上TO 买方
共3正3副， 其中一份正本由中国贸促会认证

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CCPIT认证一份正本即可。。