Hi Bicpipe and friends. This is how I managed it. There is this import invoice feature. In that invoice before importing just add a scanned image of your signature/stamp/seal etc and then copy paste it on the invoice at a place of your choice. That invoice has some formatting so someone with a word knowledge shall be able to do it efficiently. After that import that invoice and make it as default. Please do note that some features of this imported invoice do not work like the inbuilt invoices so keep track of that while reviewing it.
