Credit card logos signify to users which payment options are available.

Trust & safety badges establish some credibility.

You can also add a guarantee badge, such as a 100% satisfaction guarantee.

Typically these appear on the right side of the footer. If you also have a section with those logos on the homepage, you can optionally omit them on the homepage footer or from your footer altogether.

Most sites that have logos and badges put them in the footer or right above the footer.