To be negotiable, a promise or an order must be

To be negotiable, a promise or an order must be "unconditional".

Unconditional promise alludes to a guarantee that is unfit in nature. A gathering who makes an unlimited guarantee must play out that guarantee despite the fact that the other party has not performed by the deal. It is likewise named as independent promise. A guarantee or request is genuine in the event that it doesn't express an express condition to installment, if the guarantee or request isn't liable to or administered by another record, or if the rights or commitments as for the guarantee or request are not expressed in another record. 

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

producing or giving rise torelating to or engaged in the production of goods, crops, or other commodities.

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

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