Greeting card companies and much much more
It can be done by writing a special note according to the situation in your own handwriting or you can give an extra touch to card by adding some design. Free printable anniversary cards are available in different sizes and may not fit into envelops you have. For this reason, you might have to make your own envelop or you can search online on how to make envelops. One another solution is "plain envelop anniversary cards" which can be easily fit in plain envelops. There are really good websites on the internet that offer quality free printable anniversary cards, however, there are lot many which offer very normal free printable anniversary cards.