One of the most important factors about an Affidavit is that it must tell the truth. Making false statements on this kind of legal form can lead to many negative legal ramifications.
As the document is legally binding once signed and is done so under oath, anyone caught lying on an Affidavit can be tried for perjury.
This is a criminal offense that carries heavy penalties, including fines and imprisonment. In federal cases, individuals found guilty of perjury can face up to 5 years in prison.
Beyond legal penalties, lying on an Affidavit can severely damage your credibility in any future legal proceedings. Courts take false statements seriously, and such actions can have long-lasting effects on your legal standing.
Be sure that any claims made on your legal document are true before signing it.
Sources:
[1] Legal Requirements of an Affidavit. NIJ.
[2] Affidavit. Cornell Law.
[3] Affidavit of Support. U.S. Citizenship and Immigration Services.