Does it make a difference whether the claim is large or small?
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
Yes. The Contract Disputes Act requires that an Indian tribe or tribal organization making a claim for more than $100,000 shall certify that:
(a) The claim is made in good faith,
(b) Supporting documents or data are accurate and complete to the best of the Indian tribe or tribal organization's knowledge and belief;
(c) The amount claimed accurately reflects the amount believed to be owed by the Federal government; and
(d) The person making the certification is authorized to do so on behalf of the Indian tribe or tribal organization.
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.