@KalleKat in the c200 topic user Smid has an answer from support (post#23) here the screenshot:

@KalleKat as i said in my previous reply: post #23 (from user Smid). (Now added as screenshot)

@Richard_T123 @KalleKat @Barnacle_Bill There are already multiple topics about this watermark. On one of these topics TP-Link already replied that in a next firmware the watermark is removed again....

@tb68 in the topic about the c200 watermark, TP-Link promised to remove it on the next update.

@Smid that would be great. now wait untill the update will be released.

@KalleKat we know, the first camera with the ugly watermark was the c310. Since the last firmware also the c200 has it. But they spared the c100 until now! The last firmware for the c100 is still...