When using monthly deposits, must the money be sent directly to the Thai bank from the source (example: Social Security or rental income) to prove that it's income, or could I simply send monthly amounts from my US bank account?

Good morning, I want to create a paper trail showing my money is coming from outside of Thailand. This is visa related because in the future I may be asked to "prove" I am not working upon entering the country. In addition I would like to fulfill one of the requirements for a marriage visa and have that available to me.

Up until this point I have be withdrawing cash at the ATM and depositing cash in my BKK Bank account. I would like to start doing a monthly transfer from my American bank. As far as I can tell BKK Bank stopped allowing this recently. What are my options to transfer money that fulfill the proof of income requirements? Thank you very much.