How to sign a lawyer's power of attorney and apply for a golden visa with a Spanish lawyer?

Signing a lawyer's authorization to apply for a golden visa with a Spanish lawyer requires the client to communicate with the lawyer to determine the scope of work, understand the client's needs and budget, and then prepare a power of attorney to describe the lawyer's rights and responsibilities in detail, including the services provided and the payment of remuneration. Authorization can be signed by both the client and the lawyer.