What methods can I use to deposit 500K baht into my Thai bank account for a marriage visa?

The question primarily relates to the acceptable methods for depositing 500,000 baht into a Thai bank account for a marriage visa application. One comment suggests that wire transfers are the easiest method and recommends keeping the transaction receipts. Another comment points out that there is no need to show the origin of the funds when applying for either the initial 90-day Non-O visa based on marriage or for the subsequent one-year extension.