substantiation

US /səbˌstæn.ʃiˈeɪ.ʃən/
UK /səbˌstæn.ʃiˈeɪ.ʃən/
1.

sự chứng minh

the act of showing something to be true, or of supporting a claim with facts:

:
•
The company produced receipts in substantiation of its claim.
:
substantialsubstantially