The phrase 'verification is needed' is correct and can be used in written English.
You can use it when you want to express that some kind of confirmation or proof needs to be provided in order to verify something. For example, "Before we can finalize the contract, verification is needed that the funds are in place."
A Congressional inquiry suggests that some verification is needed.
Students must call or write to the Registrar's Office at least five business days before the verification is needed.
Reflecting deep-seated suspicion of North Korea's autocratic government, administration officials say such rigorous verification is needed to guard against cheating.
Although further verification is needed, these digestion and passage kinetics help explain why WCS are effective at stimulating chewing during eating and rumination.
A process for achieving the systematic verification is needed.
It can take several days before the freeze is in effect the first time and you may need to provide additional documentation if there has been fraud and further identity verification is needed.
But it concluded that additional verification was needed to guarantee that the explanations were complete.
Methods to reduce the complexity of the design descriptions for formal verification are needed.
Since the maximum wind-speed radius, central pressure differential, latitude of typhoon center and even surface temperature of the ocean during typhoon process affect wind-pressure distribution coefficient β more or less, further study and verification are needed to determine the method for calculating β that gives the best precision for the radial atmospheric pressure distribution of a typhoon.
Theoretical inferences and empirical verification are needed to explore the effect of the scale of immigrants and local rentals on criminal incidents and their prevention.
Verification was needed before his wife could cash in her policy.
