1.
If someone signs off , they write a final message at the end of a letter or they say a final message at the end of a telephone conversation. You can say that people such as entertainers sign off when they finish a broadcast.
O.K. I’ll sign off. We’ll talk at the beginning of the week...
PHRASAL VERB : V P
2.
When someone who has been unemployed signs off , they officially inform the authorities that they have found a job, so that they no longer receive money from the government. ( BRIT )
If you work without signing off the dole you are breaking the law.
PHRASAL VERB : V P n (not pron) , also V P