Submitting support papers after receiving a work permit is crucial for several reasons. Firstly, support papers such as identification documents, proof of address, and qualifications are necessary for the verification of your eligibility to work in a certain country. Without these documents, you may encounter difficulties in proving your right to work legally, which could lead to potential issues with immigration authorities. Submitting these papers also ensures that your employer has all the necessary information to comply with local labour laws and regulations, which can help protect your rights as a worker.