MYP grades verification

Do universities ask for proof of qualification, such as GCSE or MYP grades in my case? do they do this after offers? I took MYP at a different school to the one where I am completing DP and submitted my MYP grades to UCAS already, though I didn’t take e-assessments. Will certificate of completion be enough if they do ask for proof or will they ask for report card or something, or do the IB send my results. I was actually really confused of what grades to put on UCAS, since I didn’t take e-assessments 😭😭😭 i also didn’t mention the personal project, was I supposed to? I thought it was irrelevant since there is no equivalent in GCSEs !!! 😭😭😭

thank you for this answer. Out of curiousity, what stops students from lying about their GCSE grades in this case? I’m no condoning cheating, and this wasn’t the case for me, if anything I was conservative with the grades I used - more just out of curiosity.

ahhh i see! thank you this is quite insightful. Is this also the case for unis that consider your/ MYP grades for admission. What would keep someone from inflating their MYP grades to make their chance of admission greater, if unis don’t check?

i mean very competitive unis / courses btw like oxbridge or lse econ