What is the ruling on using or re-sending money or papers that contain words or drawings representing disbelief (kufr)?

There is no objection to using currencies that have images of living beings on them, due to the widespread need and the dire necessity of using them, and because they are debased by use or out of necessity. The predecessors used to deal with them, and you are not responsible for the images on the currency. You are compelled to possess and keep them for your benefit, so there is no objection for you. It is permissible to carry dirhams that have images of kings and leaders, as there is no sin on the one who carries them out of necessity. If there is an image of a statue or a deity on the currency, it is not forbidden to carry or use it out of necessity and a lack of approval for it. There is no objection to signing letters that have a stamp representing disbelief. If you are asked to put a stamp, avoid what has an image of living beings or a symbol of disbelief if possible, otherwise, there is no objection for you.