Generally, document examiners state that a source signatures is needed to show that the signature on a document is cut from another document then pasted onto the document in question. In this case study, a technique is presented to demonstrate how a cut-and-paste was discovered without the source signature.
When she was a girl, the young woman had emigrated with her family to the United States from her home country in Africa. She grew up in the northeastern USA and was now attending college. As part of her application for United States citizenship she must present her birth certificate. Her father sent the birth certificate to her. The birth certificate had apparent alterations. Government officials refused to accept the birth as valid because her appearance did not match the age on the birth certificate. She was born in 1994 yet birth certificate appears to state her year of birth as 1984.
The divorce had been finalized 15 years earlier. The husband had moved on with his life. He was happily remarried and enjoying his retirement years. The ex-wife could not let go. She sued in the Superior Court of Los Angeles claiming the husband would not relinquish rights to real property and other interests that had been part of the divorce settlement.
The decedent signed a life insurance beneficiary form a few weeks after having brain surgery. The plaintiff claimed the signature was not executed by the decedent. The defense claimed that the decedent had signed the document and the differences are attributed to the effects of brain surgery.