How to use if in a filtered row in powerbi?

Question

My table looks like this

Table: Money holder

SerialNo    Name 
123          A
456          A
789          B

Table: Collected by

SerialNo    Name
123          C
123          A
123          C
789          D
789          A

I need to see if there is any SerialNo with the same person in both the tables. What I tried to do was

CALCULATE( FIRSTNONBLANK('Collectedby'[Name], 1), FILTER(ALL('Collectedby'), Collectedby[SerialNo] = Moneyholder[serialno]))

And then I used if to see if the Name both are matching. But the issue here is that it looks for first value only and for Serial Number 123 it would be 'C'. But I used one more filter saying Moneyholder[name] = collectedby[name] then I would get blank for all other results.

How can I fixed this?

Desired Result: Table Money holder

SerialNo    Name     Collectedby
123          A           A
456          A           
789          B           D