Think you can get away without paper qualifications and still get the job or promotion? That was… » once upon a time».
The Common European Framework of Reference for languages (CEFR) and International Certificates such as TOEFL have changed all that.You either produce the language certificate with your CV or you will be tested to prove your claim. Also the company will know exactly what you should be able to do with the qualification achieved. Be one step ahead of your competitors. Avoid stress in your interviews and be ready for promotion at work. Prepare now to take the examination corresponding to your level reached. It´s a small investment of life-long value.