The correct Active/Passive form of the given sentence is:

☀ The electrician has already been paid for.

Explanation for other options:

☀ The electrician had been already been paid for. This option has redundant use of "already been." The correct form should be "The electrician had already been paid for."

☀ The electrician have been already paying for. This option is not in the correct verb tense. The sentence should use "has" instead of "have" to match the subject "The electrician." The correct form should be "The electrician has already been paid for."

☀ The electrician were already been paid for. This option uses the wrong verb form. The correct form should be "was" instead of "were" to match the singular subject "The electrician." The correct form should be "The electrician was already been paid for." However, this form is awkward and not commonly used. The better option is the one provided in the first answer.