Hello Graham,
In agreement with Ranjit, Runa, and Kunal, I too would say that if the employee has resigned, a company cannot make him work against his will.
Having worked in the BPO industry, which has the highest attrition rate, particularly in job abandonments, I would like to share a few of my observations regarding job abandonment cases.
The resolution that has yielded the most positive results to date is sending a firm but non-aggressive show-cause notice to the absconding employee, asking them to contact the personnel department (not the production or operations department). This should be followed by an HR personnel reaching out to the employee to determine:
a) The reason for not reporting to work
b) Whether information about their absence has been communicated to anyone in the office (which should be validated)
c) Reminding them of the 'termination of employment' clause as stated in the letter of appointment
d) If the employee is unwilling to serve notice (which is the case in 95% of instances), persuade them to buy out their notice period (this has worked in 5% of cases), offer to adjust their leave balance (if policy permits), request the handover of all documents and office property/assets, and entice them with the prospect of leaving on good terms with a relieving letter, etc. Remember, "One should never burn their bridges."
e) If the employee does not agree, do not mention the company taking legal action. Most employees are well aware of the consequences the company faces in such situations and understand how damaging it can be to the company's reputation. Your legal advisors and finance department would also concur.
As Runa previously mentioned, it is advisable to close these cases without issuing any further letters. You may want to note "full and final settlement pending for employee initiation" on these files for internal records.
While adopting such measures may not necessarily cultivate 'patrons,' they do help in preventing the spread of negative talk.
I am curious to know how you would ultimately extricate yourself from this tricky situation. ;)
Warm regards