An information processing system comprising: a status management unit configured to control a status, between read and unread, of a document received by facsimile from a sender apparatus; a rejected number proposal determining unit (26; 64) configured to determine whether a predetermined condition is satisfied for each sender facsimile number; and a display control unit configured to control display of a proposal screen for proposing that a sender facsimile number be registered as a rejected facsimile number, based on a determination by the rejected number proposal determining unit (26; 64) that the sender facsimile number satisfies the predetermined condition, wherein a facsimile from the rejected facsimile number is to be rejected or deleted, and wherein determining whether a predetermined condition is satisfied for each sender facsimile number comprises one of the following: (i) for each sender facsimile number, determining whether a number of unread documents received from that sender facsimile number is equal to or greater than a threshold value; (ii) determining, for each sender facsimile number, whether there is an unread document sent from the sender facsimile number and having been left unread for a first predetermined period or longer after facsimile reception; and (iii) for each sender facsimile number, determining whether the number of times a document is received from the sender facsimile number within a second predetermined period is greater than or equal to a preset threshold. a status management unit configured to control a status, between read and unread, of a document received by facsimile from a sender apparatus; a rejected number proposal determining unit (26; 64) configured to determine whether a predetermined condition is satisfied for each sender facsimile number; and a display control unit configured to control display of a proposal screen for proposing that a sender facsimile number be registered as a rejected facsimile number, based on a determination by the rejected number proposal determining unit (26; 64) that the sender facsimile number satisfies the predetermined condition, wherein a facsimile from the rejected facsimile number is to be rejected or deleted, and wherein determining whether a predetermined condition is satisfied for each sender facsimile number comprises one of the following: (i) for each sender facsimile number, determining whether a number of unread documents received from that sender facsimile number is equal to or greater than a threshold value; (ii) determining, for each sender facsimile number, whether there is an unread document sent from the sender facsimile number and having been left unread for a first predetermined period or longer after facsimile reception; and (iii) for each sender facsimile number, determining whether the number of times a document is received from the sender facsimile number within a second predetermined period is greater than or equal to a preset threshold. (i) for each sender facsimile number, determining whether a number of unread documents received from that sender facsimile number is equal to or greater than a threshold value; (ii) determining, for each sender facsimile number, whether there is an unread document sent from the sender facsimile number and having been left unread for a first predetermined period or longer after facsimile reception; and (iii) for each sender facsimile number, determining whether the number of times a document is received from the sender facsimile number within a second predetermined period is greater than or equal to a preset threshold.