10 ILCS 5/5-13
The canvassers, or one of them, shall prepare a list of the names of the parties designated as aforesaid, and to whom such notice has been sent, given, or left at the address, and make and attach his, or their affidavit or affidavits thereto stating that notice, duly stamped, was mailed to each of the said parties at the places designated on said list, on or before 10 o'clock p. m. of the Thursday following the canvass, and that notice was also personally left at the said address of each of said parties named in said lists so attached, if there be such address. Blank affidavit forms shall be furnished by the County Clerk for the purpose aforesaid; but if none are furnished, such canvassers shall cause the same to be drawn, and they shall swear to such affidavit before the Judge of Registration of such precinct or County Clerk, or one of his Deputies.
Either of the canvassers shall have the power and right of both in the matter pertaining to such canvass; but in case either refuses or neglects to make such canvass as aforesaid, then the other may make such canvass alone.
In case of the temporary disability upon the part of either canvasser, the remaining canvasser shall appoint a temporary canvasser who shall represent and be affiliated with the same political party as the canvasser whose place is being filled, and shall administer to him the usual oath of office for canvassers. Such temporary canvasser shall perform all the duties of the office until the disability of the regular canvasser is removed.
10 ILCS 5/5-13