Kopers bevestig woonadresse by wyse van bewyse van woonadres.

Kopers means buyers. The singular is koper = buyer.

This is a regular plural formed with -s:

• koper = buyer
• kopers = buyers

A small extra note: koper can also mean copper in other contexts, but in this sentence kopers clearly means buyers.

Because Afrikaans verbs usually do not change form for person or number in the present tense.

So you get:

• Ek bevestig = I confirm
• Jy bevestig = you confirm
• Die koper bevestig = the buyer confirms
• Kopers bevestig = buyers confirm

Unlike English, Afrikaans does not usually add something like -s for he/she/it in the present tense.

Woonadresse means residential addresses or home addresses.

It comes from the compound noun:

• woonadres = residential address / home address
• woonadresse = residential addresses

Afrikaans often forms compound nouns like this. Here:

• woon- relates to living/residing
• adres / adresse = address / addresses

So woonadres is literally something like residence-address.

Because woonadresse is more specific.

• adresse = addresses
• woonadresse = residential addresses

If you only say adresse, that could mean any kind of address: postal, business, residential, and so on.
Adding woon- makes it clear that the sentence is about a person’s home/residential address.

By wyse van is a formal expression meaning something like:

• by means of
• by way of
• through

It is common in legal, official, or administrative Afrikaans.

So this part:

by wyse van bewyse van woonadres

means roughly:

by means of proof/proofs of residential address

In everyday Afrikaans, people might use something simpler, such as met or deur middel van, depending on the context.

Because they belong to two different structures.

1. by wyse van is a fixed expression
2. bewyse van woonadres means proofs of residential address

So:

• first van = part of by wyse van
• second van = links bewyse with woonadres

It may feel repetitive to an English speaker, but it is grammatically normal.

The singular is bewys = proof / evidence.
The plural is bewyse = proofs / pieces of evidence.

So:

• bewys van woonadres = proof of address
• bewyse van woonadres = proofs of address / pieces of proof of address

In official language, the plural can suggest supporting documents or evidence in general. In practice, the singular is also very common if one document is meant.

Because the sentence is making a general statement, not talking about one specific buyer or one specific document.

Compare:

• Kopers bevestig woonadresse ... = Buyers confirm residential addresses ...
• Die kopers bevestig die woonadresse ... = The buyers confirm the residential addresses ...

Afrikaans, especially in formal or instructional style, often leaves out articles when speaking generally.

Yes. The basic order is normal for a main clause in Afrikaans:

• Kopers = subject
• bevestig = verb
• woonadresse = object
• by wyse van bewyse van woonadres = prepositional phrase explaining how

So the structure is:

Subject + Verb + Object + How/By what means

That is very typical Afrikaans word order.

It is understandable, but it sounds formal and bureaucratic rather than conversational.

That is mainly because of the phrase by wyse van and the heavy noun phrasing.

A more everyday version might be something like:

• Kopers bevestig hul woonadresse met bewys van adres.
• Kopers moet hul woonadresse met 'n bewys van adres bevestig.

So the original sentence sounds like something from a policy document, form, or legal text.

Adres is the general word for address.
Woonadres is specifically a residential/home address.

So:

• adres = address
• woonadres = residential address / home address

If a document needs to distinguish between a home address and, for example, a business or postal address, woonadres is the clearer choice.