question| Is it permissible to swear in conducting a commercial transaction?

answer| Swearing^⁎ is either objectionable or impermissible: If one is being honest, it would be canonically objectionable, but if one is lying, it would be impermissible.

^⁎ That is, swearing by God or a holy person or object as a way to emphasize or reinforce the veracity of one’s claim.