My ex of 5 years ago, whom I left taking a toddler and newborn with me, initially travelled 200 miles to visit his children 2/3 times a year until I stopped funding the travel costs so he stopped.
He had a bond with the eldest but the youngest was still barely a toddler the last time he saw them.
There's been no contact at all for the last two years. He hasn't spoken to the children, sent cards, anything.
He opened an access case against me last year but failed to attend the first Mediation appointment or to respond to any solicitor advice.
Then suddenly this week I receive a Facebook friend request from a profile he's created titled Fred billandbensdaddy (not our real names) and he's sent friend request to most of my Friendlist too, barring my Mum and other sister, who know him too well.
He's also sent a birthday card to my eldest which reads like a business document, not a sentimental flourish of affection. Listing all his contact details, dating the card perfunctorily, using the expression 'contact & access' in his suggestion to my eldest (age just turned 7).
He appears to be following the original solicitor advice of last year, to gradually re-establish contact, starting by greetings cards.
He isn't responding to any of my (affronted and perplexed) messages via Facebook either, expressing my surprise at this volte-face.
Previously he relished any opportunity of attacking me (in any communication medium) which further adds to my suspicion. There's DV history, and I'm aware that even mentioning this or not mentioning it in Mumsnet opening posts can immediately dictate the replies.
Because of our past and his total lack of co-operation last year with the access case he opened but failed to continue, along with the total lack of contact with the children for the last two years (at one point he even walked straight past the children a few feet away my friend said (I was somewhere else whilst the children were left with my friend and my sister), ignoring them, as we both attended an airshow at the same time in my home area, for which he'd travelled hundreds of miles ...
So, really, do I now give my daughter the birthday card he sent, despite it seeming to insinuate the lack of contact wasn't down to him. He suggests she should contact him 'now she is old enough to read and write' or phone him or Facebook him. Nothing about why he hasn't contacted her or that he is going to be doing all the chasing 
This development has knocked me back hugely. My life had moved on and I had set all parameters in place already for explaining to the children why they never saw their Daddy. Now I'm supposed to draw in those parameters again? It smacks of inconsistency.
I'm left by this feeling perplexed, confused, frustrated he won't respond to me personally about his action. All past memories dredged up again. All this because he sent a Facebook friend request and a birthday card after two years of nothing.
All views and advice genuinely appreciated.
Thankyou :)