The following is the USPS response to an inquiry from APWU regarding medical documentation for absences of three days or less:

This is in response to your August 27 letter regarding medical documentation or other acceptable evidence for absences of 3 days or less which was received in this office on August 28. In your correspondence, you allege that the RMD/eRMS application improperly mandates management to require employees to provide medical documentation or other acceptable evidence for periods of absence of 3 days or less.

Please be assured that the eRMS application does not change Postal Service policy concerning medical documentation for absences when employees call in sick. As far as the Postal Service is concerned, there is no dispute or disagreement regarding the conditions under which an employee may be required to submit medical documentation or other acceptable evidence for periods of absence of 3 days or less.

USPS Response (PDF)

APWU 8-27-07 letter - It has been called to my attention that through the application of the RMD/eRMS, local management is improperly requiring employees to submit medical documentation or other acceptable evidence for future absences of 3 days or less, It is my understanding that based on a supervisor’s review of an employee’s attendance record, supervisors are making a determination that medical documentation is deem desirable (requiring an employee to submit medical documentation of other acceptable evidence) for absences of 3 days or less, for the protection of the interest of the Postal Service. As you know, it is improper for management to deem documentation desirable for 3 days or less based on a review of an employee attendance record.

Moreover, in the absence of an employee being on restricted sick leave, supervisors may not require medical documentation or other acceptable evidence because of abuse or excessive use of sick leave for 3 days or less.