If you are still sick at the start of the 23rd week of your period of entitlement to SSP and likely to remain sick beyond the 28th week, you may claim universal credit (see Chapter 14 ) and/or ‘new style’ employment and support allowance (ESA; see Chapter 11 ). Your employer must complete and send you form SSP1. On the form, your employer must state why SSP is ending and the last day it will be paid. You will need this form to support claims for universal credit and ESA.

The employer must issue the SSP1 if you are not entitled to SSP or whenever they stop paying it. The form should be issued within seven days of your request for it or, if this is impracticable, by the next pay day.

If your employer is holding any of your fit notes covering days beyond the last day of your SSP entitlement, these should be returned to you with form SSP1. You will need these to support claims for universal credit and ESA.
SSP Regs, reg 15(1A),(3)&(4)