Specifically with the DWP, I personally dread the process of a change in circumstances no matter whether positive or otherwise. It's always a time of uncertainty, worrying how it will impact our finances. Also there's always the possibility any changes in my health will trigger another assessment which would be a real inconvenience to us. I worry it would be like starting all over again from scratch or it could take months to complete as I believe they are so far behind with claims.
Likewise the local authority has to be notified of changes in status or circumstances. I particularly feel the phrasing they both use to get their message across implies threat or significant consequences for not doing so urgently. i.e. "You must tell us immediately"....
Last year we moved house so I anticipated a bumpy ride in respect of my details needing to be verified or changes in payments. It's like throwing stone on a pond some create ripples some can turn to waves or some even turn into a tsunami depending on how dramatic the changes are.
I do remember feeling as though the DWP didn't believe me when they needed to ask for further documents to prove I was living here. How a tenancy agreement wasn't good enough proof, I just can't imagine, but they wanted more information and when you've only just moved house you're not necessarily going to have that to hand. It took time to change utility bills or update my bank account with the new address which especially in the days of paperless bills can take time to process. I mean it was enough of a mess switching energy companies, in order to have gas and electric supplies set up with my preferred supplier. Then internet and water utilities, never mind satisfying the DWP further than I had already tried to.
Not as though we can predict our futures, however, I personally prefer to avoid changes in circumstances at all costs.