> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# IsValid Method of the AuthorInfo Object

> IsValid method of the AuthorInfo Object in the ABBYY FineReader Engine API — Returns whether the author information is valid; requires either a nickname or both a first and last name.

This method checks whether the specified author information is valid. The information is considered valid if the nickname or the first and last name are specified.

## Syntax

### C++

```cpp theme={null}
HRESULT IsValid( VARIANT_BOOL* Result );
```

### C\#

```csharp theme={null}
bool IsValid();
```

### Visual Basic .NET

```vb theme={null}
Function IsValid() As Boolean
```

## Parameters

Result

\[out, retval] Receives the result of validation. This parameter is TRUE if the information of the author is valid.

## Return values

This method has no specific return values. It returns the [standard return codes of ABBYY FineReader Engine functions](/fine-reader/engine/api-reference/return-codes).

## See also

[AuthorInfo](/fine-reader/engine/api-reference/document-related-objects/authorinfo)