Chris Heaton-Harris, the MP for Daventry, studied FIFA's regulations and realised that although they prohibited such symbols on team shirts of national teams they would allow poppies to be on the armbands.
He contacted a FIFA adviser with the proposal and was put in touch with FIFA's secretary general Jerome Valcke, and then spoke to Football Association executives to secure the agreement.
Heaton-Harris told Press Association Sport: "I was reading the FIFA regulations and it was fairly obvious you could not have a poppy on the shirt - but that you could on an armband.
"I contacted someone close to FIFA and ended up speaking to Jerome Valcke on the phone and then the FA.
"There was a lot of stuff going on in the background today with the Prime Minister and Prince William both writing to FIFA but I did have a small part to play."
Heaton-Harris said he hoped people would give FIFA credit for their decision - especially after two members of the English Defence League climbed onto the roof of FIFA headquarters this afternoon, highlighting that there could be a political aspect to wearing a poppy.