Русско-англо-русский юридический словарь

The burden of producing evidence means that in general the party that cites specific facts for the substantiation of its claim also has the burden of producing the evidence to prove these facts. This burden depends on the substantive law governing the claim. Permissible presumptions and legal rules can shift the burden in various situations. (Britannica)

• The company produced receipts in substantiation of its claim.

• The criticisms were without factual substantiation.

• He was surprised at the lack of factual substantiation in the report.

• We have substantiation of every single thing that is said in every ad. (Cambridge Advanced Learner's Dictionary & Thesaurus)

This is not only an unorthodox approach that requires more substantiation than is given in the book, it also makes a number of incorrect predictions.

Most of these claims are mentioned in passing, without substantiation.

However, the evidence is weak and needs further substantiation.

All the essays are short, which makes substantiation of ambitious theses difficult. (Cambridge English Corpus)

The department may require employees to provide vouchers, receipts, or other substantiation for any fees or expenses claimed. (Dictionary.com)