Matching contributions
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
(a) A participant is not entitled to keep the matching contributions and their associated earnings that are attributable to refunded default employee contributions.
(b) The matching contributions and associated earnings attributable to refunded default employee contributions shall be forfeited to the TSP and used to offset administrative expenses.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.