"implicit assurance" is correct and usable in written English.
You can use it to refer to an assurance given without the need for explicit words or promises. For example, "The silence of the other party gave me an implicit assurance that the deal would be completed."
These banks will be more likely to take on excessive risk because they have the implicit assurance of rescue.
The very point of hate speech, he says, "is to negate the implicit assurance that a society offers to the members of vulnerable groups — that they are accepted … as a matter of course, along with everyone else".
Just as a Mercedes promises not only to be a conveyance but a model of modern automotive engineering, so too does Napa Valley hold out the implicit assurance that its wines will offersomething special that comes specifically from grapes grown in its hallowed realm.
They involve undermining a public good, which he identifies as the "implicit assurance" extended to every citizen that while his beliefs and allegiance may be criticized and rejected by some of his fellow citizens, he will nevertheless be viewed, even by his polemical opponents, as someone who has an equal right to membership in the society.
They only require an implicit assurance from the senior author that all listed authors contributed to the manuscript.
These new friends will provide support and advice, but the most important thing that they give you is implicit assurance that you are not crazy.
Especially with the implicit assurances by the government on honoring warranties.
Perhaps most significantly, the legislation hardens the government's long-implicit assurance that it would step in to rescue the two mortgage giants who together own or guarantee about $5.2 trillion of the nation's $12 trillion in mortgages.
And even if there were, there would be no implicit reason or assurance for us to get together.
It is an ugly doctrine, which inhibits every effort to outperform our rivals, because implicit in it is the assurance that the effort will end in betrayal.
This time, Rosneft's economic assurances — and the implicit support of Moscow that came with them — gave Kurdish leaders confidence that they could weather the post-referendum storm, according to sources closely involved in the region's politics and oil sector.
