As you can see from Martinez's signature, they probably have more than one pattern of each autograph. But you may also receive an original one, I wish you so.

Autopen signatures match each other exactly. Here`s mine
[img]https://scontent.xx.fbcdn.net/hphotos-xfa1/v/t1.0-9/19499_376901632507939_46186748603416199_n.jpg?oh=966b1ef5a5b0f79072a199762105215b&oe=55D2115E[/img]
Doesn`t look like yours. And here is another one. Looks different also
http://www.fanmail.biz/mboard/viewtopic.php?f=2&t=355731&p=

As you said, so said they started to do that, if some players or any doesn't want to sign, they just could stop to send autographs but lie people sending autopens is a bit disappointing.

Sad to say, but Bayern have started to send some autopens in this and 2013/14 seasons. Most probably it is not about every players, but some of them are definitely not original. It was hard to recognize it, because they use different colors and sizes of signatures... and there is more than one pattern of every autograph. Here are some proves.

Guardiola:
[img]http://i60.tinypic.com/4q51g2.png[/img]

Martinez:
[img]http://i58.tinypic.com/21eca4l.jpg[/img]
[img]http://i58.tinypic.com/2ivfg2a.jpg[/img]

Neuer:
[img]http://i58.tinypic.com/2uqfalv.jpg[/img]

Robben:
[img]http://i59.tinypic.com/2zivj9e.jpg[/img]

Thiago:
[img]http://i57.tinypic.com/s5a6f6.jpg[/img]

Xabi Alonso:
[img]http://i58.tinypic.com/20z35g0.png[/img]

I think Ribery is also autopen, but cannot find the proof.