Lock was the sole director of food and health company Nubiotics, which collapsed in 2014.
In March this year, liquidator Kelman and Co said it had received four claims totalling $451,379.
SFO director Julie Read said the company's prosecution would help preserve the reputation of New Zealand companies as reliable exporters of quality milk and honey products.
"New Zealanders have a reputation for being honest in their business dealings and for this reason, Mr Lock's customers trusted the representations he made to them.
"In reality Mr Lock deceived his customers, using false statements, forged documents and other means to disguise his failure to fulfil his obligations.
"He also supplied false information to the SFO while under investigation."
Lock will be sentenced in October.