We have a .Net website and would like to (stamp) pdf files prior to sending them to customers, this should be a backend process with no human intervention.
all the documents are a4 size, we will pre-decide the exact location of the stamp on each document type and the design of the stamp (regular blue stamp design).
This should not be a subscription to any external provider.
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Basically you will give me the code that I can use, the variables would be
1- Stamp type (as a GIF image)
2- stamp location (coordinate)
just give me the code and I will implement it