For the purpose of surrendering the defendant the sureties, at any time before they are finally charged, may arrest the defendant or by a written authority endorsed on a certified copy of the bond may empower any discreet person to do so.
Wis. Stat. § 818.21
Arrest of principal by bail
Sup
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.