Source: https://www.web-security.com/withdrawal/
Timestamp: 2019-04-23 02:49:26+00:00

Document:
The customer, therefore you, may revoke the contract without giving reasons in writing (ex. letter, fax, email) within 14 days. The period begins upon receipt of this instruction in writing, but not prior to closing and also does not fulfill our obligations under Article 246 § 2 in connection with § 1 paragraph 1 and 2 EGBGB and our obligations according to § 312g paragraph 1 sentence 1 BGB in conjunction with Article 246 § 3 BGB. To safeguard the withdrawal period is sufficient to send the revocation..
Your right expires prematurely if the contract is completely fulfilled by both parties at your explicit request before you have exercised your right.
s If you are a business within the meaning of § 14 German Civil Code (BGB) and act in exercise of your commercial or self-employment act upon while concluding the contract, the right of withdrawal is evoked. The right of withdrawal does not exist when the delivered good is manufactured according to customer specifications, according tp § 312 paragraph 4 no. 1 BGB.

References: § 2
 § 1
 § 312
 § 3
 § 14
 § 312