| Title | 
                
                    Test
                    Find
                    
                    Parcelforce - International tracking of imports
                 | 
            
            
                | Expression | 
                ^[A-z]{2}\d{9}(?![Gg][Bb])[A-z]{2}$  | 
            
            
                | Description | 
                UK Parcelforce delivery tracking  code for international tracking of imports. Uses a negative look ahead to prevent it ending in GB which would be an international export code.  | 
            
            
                | Matches | 
                AA123456789AA  | 
            
            
                | Non-Matches | 
                AA123456789GB  |  AA123456789gb  |  AA123456789Gb  |  AA123456789gB  | 
            
            
                | Author | 
                
                    Rating:
                        
Not yet rated.
                    Matthew Harris
                 | 
            
            
                | Source | 
                http://www.parcelforce.com/help-and-advice/sending-worldwide/tracking-number-formats | 
            
            
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