1with objectMake an official declaration that (something) complies with regulatory standards or procedures without independent substantiating evidence.
‘carmakers want to self-certify the safety of their vehicles with minimal regulatory oversight’
‘if you wish to self-certify your earnings, you will have to supply accounts for the year’
‘organizations can obtain the one-year deferral by self-certifying that they meet the criteria’
1.1British no objectFormally declare that one's absence from work was due to illness, without providing substantiating evidence from a doctor.
‘you can self-certify if you have been off work for seven days or less’
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