Many federal courts add a bail sufficiency requirement to the bond, also known as a "Nebbia, Nebia Hearing, bail source hearing or 1275 bail sufficiency hearing". Basically the burden of proof is on the defendant and his/her family to show that the collateral and money paying the bond is from a legitimate source. A Nebbia hold requires the defendant and co-signers of the bond (his friend or family member) to produce and disclose the source of bail premium and collateral prior to the defendant's release on bail. The defendant must show that the source of the bail premium and collateral are from a legitimate source and were not acquired through illegal activities, or from the profits of a crime such as drug trafficking, money laundering, theft or fraud. Testimony, accounting documents, tax returns, banking records, and business records are a few things a court may consider in determining the sources of the finances are legitimate.