Yes Indeed, art. 14 f of UCP600 should be applicable.
Almost all banks from Nigeria do add an additional condition stating how the CCVO should be issued.
The combined certificate of value and origin (form C16) signed and WITNESSED must contain the following details: form 'M' no, description of goods, port of destination in Nigeria (same as in field 45A), port of loading, B/L number/vessel or voyage number/shipping marks, frieght cost, applicant's name, address and contacts, beneficiary's name, address and contacts, beneficiary's name, address and contacts, date of shipment, country of origin and country of supply, the unit prices, FOB, freight cost and CFR values should be stated separately.
If the l/c doesn't state that CCVO should be WITNESSED confirming bank can not refuse on it.