This was really easy to do. Our triplets arrived 10 days ago, so I contacted BA a few days after they were born. I have third party access on my wife's account, so I just sent through the birth confirmation paperwork from the hospital (the girls are still there and will be for a few weeks, as they were born at 31+3 weeks) and three days later we both got emails confirming our Silver status would be extended. Nothing showing up on my account, but my TP year ends this month, so I'll see once it resets. My wife had just requalified so hers is extended to August 2021, but I had only earned 40 TPs this year, due to a combination of work travel on AF last autumn and having halted basically all travel (work and leisure) since March due to complications with the pregnancy. All three girls are healthy and doing really well - they just need to bulk up before they come home.