No valid account number was specified
or
valid account number was not specified
I think both of them are correct but which one is more common? And which one is more formal?
No valid account number was specified
or
valid account number was not specified
I think both of them are correct but which one is more common? And which one is more formal?
The first sentence is correct:
No valid account number was specified.
The second sentence needs an indefinite article at the beginning to make it correct:
A valid account number was not specified.