I have the same issue, my company where I worked no longer exists as it got merged with other company. Luckily I had all the documents like payslips, offer letter, exp letter etc. I provided LOE stating the company no longer exists and got merged. Luckily I have an old colleague who still works for the company after merger, he provided me merger document That he received from the company. I attached that to support my LOE.Awaiting a response, senior members please let me know. Thanks
I just submitted my application, in case SINP raises any ADR I have ex colleague who can provide the same letter and reference and I will get it notarized.
Hope it helps!