zaświadczyć

Etymology
From.

Verb

 * 1)  to confirm, to corroborate
 * 2)  to confirm something by one's existence, behavior, or appearance
 * 3)  to testify in court
 * 1)  to confirm something by one's existence, behavior, or appearance
 * 2)  to testify in court
 * 1)  to testify in court
 * 1)  to testify in court
 * 1)  to testify in court