No
You have no obligation to tell a bailiff your current address if you have moved.
In any case, bailiffs must return the warrant to the creditor so it can apply for a new warrant with the debtors new address,[1] and the debtor must be given a Notice of Enforcement before the bailiff takes an enforcement step at the new address.[2]
If you accidentally tell a bailiff your new address, then he might ambush you by attending without giving you a statutory notice of enforcement.
If this happens, the debtor can sue the creditor and the bailiff for breach of enforcement regulations by making an application to court.[3][4]
The debtor may also recover damages,[5] and costs against the creditor or the bailiff for the breach.[6][7][8]
[1] Civil Procedure Rule 75.7(7)
[2] Paragraph 7 of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[3] Civil Procedure Rule 84.13
[4] Civil Procedure Rule 23.6
[5] Paragraph 66 of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[6] Civil Procedure Rule 46.5
[7] Practice Direction 46.5 Rule 3.1
[8] Civil Procedure Rule 44.2
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