A subscribing witness is someone who is present when another person signs a document. When a signatory is not present, but for legal reasons verification of a signature is necessary, a subscribing witness's notarized statement or affidavit can in some cases validate the legitimacy of a legal document. However, in the case of investment bonds, not only are subscribing witness affidavits not needed, but the law does not allow them to certify the validity of securities.
As binding contracts relating to people's financial investments, bonds can only be issued by primary signatories -- executives or government officials. The organization or agency issuing a bond is taking an investor's money and subjecting her to risk in exchange for a promised gain. The law does not rely on second-hand accounts when issuing securities, even when a witness may be perfectly credible.
Subscribing witness testimonies or statements must be notarized to ensure the person making the statement is who they claim to be. In many cases, bonds -- especially private or junk bonds -- are notarized to ensure that the person issuing a legal security is a legitimate and authorized signer.
A subscribing witness may be used for the issuance of a bail bond, which is not an investment product. If a bail bond purchaser signs documents in front of a witness, but not a notary, the witness can affirm to a notary that the signature on the documents is that of the purchaser. Laws and court policies vary by jurisdiction.
Although a subscribing witness can be used in the process of purchasing and issuing a bail bond, it's not required. In fact, legal documents are typically stronger and more likely to hold up in court when the primary signatory and a witness are both in front of a notary when executing a document.
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