For years up to and including 1999/2000. When you first learn that a married couple are living apart from a date before 6 April 2000 you need to know
To obtain this information, if you do not already have it, issue
a letter or if you have any remaining stocks, form 41(Sep). Before
issuing the form delete 'Sir', 'Madam', 'husband' and 'wife' as
appropriate.
Send the leaflet IR93 'Separation, Divorce and Maintenance
Payments' with the form. Show the date of issue of the IR93 on the
front of the 41(Sep). If you do not need to issue a 41(Sep) send
the leaflet anyway.
Record the date of issue of the IR93.
For 2000/01 and subsequent years. When you first learn that a married couple or civil partners are living apart after 5 April 2000 you need to know if either party was born before 6 April 1935. If either was, obtain the information of the separation (as above) by way of letter. If neither was, then no maintenance relief is due.