What additional documents are required for embassy approval for a visa application?

In order to respond to all those who asked me what additional documents the embassy asked me for before approval, see the summary of requirements below:

Requested Documents:

1. Biodata page of your passport

2. Official bank statement issued directly by your bank (via official website or physical branch).

Must include: your full name as account holder, transaction history, and most updated balance.

Note Screenshots are not accepted.

3. Proof of current location in Spain. Examples include: electricity bill, municipal registration certificate (padrón), or rental agreement under your name.

4. Proof of last 3 self-employment payments (autónomo). Official receipts or confirmations of your last three freelance/self-employed tax or social security contributions.

5. Concise overview of your professional activities in Thailand. A short explanation of my business or professional engagements during my stay in Thailand.

Include how you will generate income while residing there.

6. Concrete evidence of your job. Documents that demonstrate and verify your professional status (portfolio, client list, contracts, content, etc.).