Wis. Stat. § 889.19

Any deed, mortgage, land contract or other conveyance that has been duly recorded in the proper register’s office for 20 years, and any will that has been admitted to probate, containing a recital in respect to pedigree, blood relationship, marriage, celibacy, adoption or DOCUMENTARY EVIDENCE 889.293 descent, and being in other respects admissible in evidence, shall be admitted as prima facie evidence that the recital is true.